Entity Central Index Key Document document and entity information. Document Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well Known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Entity Public Float Entity Public Float Receivables and prepaid expenses. Field equipment, net, noncurrent. Severance pay fund noncurrent. Employee related liabilities noncurrent. Statement Of Financial Position [Abstract] Assets Assets [Abstract] Current assets: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Short-term investments Held To Maturity Securities Current Restricted cash Restricted Cash Current Trade receivables, net Accounts Receivable Net Current Receivables and prepaid expenses Receivables And Prepaid Expenses Inventories Inventory Net Total current assets Assets Current Long-term assets: Assets Noncurrent [Abstract] Property and equipment, net Property Plant And Equipment Net Field equipment, net Field Equipment Net Noncurrent Severance pay fund Severance Pay Fund Noncurrent Other long-term assets Other Assets Noncurrent Total long-term assets Assets Noncurrent Total assets Assets Liabilities and shareholders’ equity Liabilities And Stockholders Equity [Abstract] Current liabilities: Liabilities Current [Abstract] Trade payables Accounts Payable Trade Current Other payables and accrued expenses Other Accounts Payable And Accrued Liabilities Total current liabilities Liabilities Current Long-term liabilities: Liabilities Noncurrent [Abstract] Long-term loan, net of discount and issuance costs Long Term Debt Noncurrent Deferred revenues Deferred Revenue Noncurrent Employee benefit liabilities Employee Related Liabilities Non Current Other long-term liabilities Other Liabilities Noncurrent Total long-term liabilities Liabilities Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments And Contingencies Shareholders’ equity: Stockholders Equity [Abstract] Ordinary shares - No par value, Unlimited shares authorized; Issued and outstanding: 93,254,185 shares and 89,478,032 shares at December 31, 2018 and December 31, 2017 respectively; Common Stock Value Additional paid-in capital Additional Paid In Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income Loss Net Of Tax Accumulated deficit Retained Earnings Accumulated Deficit Total shareholders’ equity Stockholders Equity Total liabilities and shareholders’ equity Liabilities And Stockholders Equity Common stock, par value Common Stock No Par Value Common stock, shares authorized Common Stock Shares Authorized Unlimited Common stock, shares issued Common Stock Shares Issued Common stock, shares outstanding Common Stock Shares Outstanding Income Statement [Abstract] Net revenues Revenues Cost of revenues Cost Of Revenue Impairment of field equipment Production Related Impairments Or Charges Gross profit Gross Profit Operating costs and expenses: Operating Expenses [Abstract] Research, development and clinical trials Research And Development Expense Sales and marketing Selling And Marketing Expense General and administrative General And Administrative Expense Total operating costs and expenses Operating Expenses Operating income (loss) Operating Income Loss Financial income (expenses), net Interest And Debt Expense Income (loss) before income taxes Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income taxes Income Tax Expense Benefit Net income (loss) Net Income Loss Basic and diluted net income (loss) per ordinary share Earnings Per Share Basic And Diluted Weighted average number of ordinary shares used in computing basic and diluted net income (loss) per share Weighted Average Number Of Share Outstanding Basic And Diluted Statement Of Income And Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss), net of tax : Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract] Change in foreign currency translation adjustments Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax Pension benefit plan Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax Total comprehensive income (loss) Comprehensive Income Net Of Tax Stock issued during period shares exercise of options and warrants. Stock issued during period value exercise of options and warrants. Cumulative effect on retained earnings. Statement Of Stockholders Equity [Abstract] Statement [Table] Statement [Table] Equity Components Statement Equity Components [Axis] Equity Component Equity Component [Domain] Ordinary Shares Common Stock [Member] Additional Paid-in Capital Additional Paid In Capital [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income [Member] Retained Earnings (Accumulated Deficit) Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Balance Balance (in shares) Shares Outstanding Share-based compensation to employees Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value Exercise of options and warrants Stock Issued During Period Value Exercise Of Options And Warrants Exercise of options and warrants (in shares) Stock Issued During Period Shares Exercise Of Options And Warrants Proceeds from issuance of shares Stock Issued During Period Value New Issues Proceeds from issuance of shares (in shares) Stock Issued During Period Shares New Issues Issuance of shares in connection with employee stock purchase plan Stock Issued During Period Value Employee Stock Purchase Plan Issuance of shares in connection with employee stock purchase plan(in shares) Stock Issued During Period Shares Employee Stock Purchase Plans Tax benefit from share-based award activity Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation Cumulative effect adjustment resulting from ASU 2016-09 adoption (See Note 2) Cumulative Effect Of New Accounting Principle In Period Of Adoption Cumulative effect adjustment resulting from ASC 606 adoption (See note 2) Cumulative Effect On Retained Earnings Other comprehensive income (loss), net of tax (benefit) expense of $38, $68, and $10 for the years ended December 2016, 2017 and 2018 Other Comprehensive Income Loss Net Of Tax Balance Balance (in shares) Sale of Stock Subsidiary Sale Of Stock [Axis] Sale of Stock Sale Of Stock Name Of Transaction [Domain] Over-Allotment Over Allotment Option [Member] Class of Stock Statement Class Of Stock [Axis] Class of Stock Class Of Stock [Domain] Outstanding nonredeemable series J preferred stock or outstanding series J preferred stock. Classified within stockholders' equity if nonredeemable or redeemable solely at the option of the issuer. Classified within temporary equity if redemption is outside the control of the issuer. Series J Preferred Stock Series J Preferred Stock [Member] Other comprehensive income (loss), tax (benefit) expense Other Comprehensive Income Loss Tax Share issuance expenses Adjustments To Additional Paid In Capital Stock Issued Issuance Costs Increase (decrease) in receivables and prepaid expenses. Payments to acquire of field equipment. Statement Of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided By Used In Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Depreciation and amortization Depreciation And Amortization Asset write-downs and impairment of field equipment Asset Impairment Charges Share-based compensation Share Based Compensation Excess tax benefits from share-based award activity Excess Tax Benefit From Share Based Compensation Operating Activities Decrease (increase) in trade receivables, net Increase Decrease In Accounts Receivable Amortization of discount, net Amortization Of Debt Discount Premium Decrease (increase) in receivables and prepaid expenses Increase Decrease In Receivables And Prepaid Expenses Decrease (increase) in inventories Increase Decrease In Inventories Decrease (increase) in other long-term assets Increase Decrease In Other Noncurrent Assets Increase (decrease) in trade payables Increase Decrease In Accounts Payable Trade Increase (decrease) in other payables and accrued expenses Increase Decrease In Other Accounts Payable And Accrued Liabilities Increase (decrease) in employee benefit liabilities, net Increase Decrease In Employee Related Liabilities Increase (decrease) in other long-term liabilities Increase Decrease In Other Noncurrent Liabilities Net cash provided by (used in) operating activities Net Cash Provided By Used In Operating Activities Cash flows from investing activities: Net Cash Provided By Used In Investing Activities [Abstract] Purchase of property and equipment Payments To Acquire Property Plant And Equipment Purchase of field equipment Payments To Acquire Of Field Equipment Proceeds from maturity of short-term investments Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities Purchase of short-term investments Payments To Acquire Held To Maturity Securities Net cash provided by (used in) investing activities Net Cash Provided By Used In Investing Activities Cash paid during the period for. Cash flows from financing activities: Net Cash Provided By Used In Financing Activities [Abstract] Proceeds from issuance of shares, net Proceeds From Issuance Of Common Stock Proceeds from long-term loan, net Proceeds From Issuance Of Long Term Debt Repayment of long-term loan Repayments Of Long Term Debt Excess tax benefits from share-based award activity Excess Tax Benefit From Share Based Compensation Financing Activities Proceeds from issuance of other long-term loans Proceeds From Issuance Of Other Long Term Debt Repayment of other long-term loans Repayments Of Other Long Term Debt Exercise of options and warrants Proceeds From Stock Options Exercised Net cash provided by financing activities Net Cash Provided By Used In Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Increase (decrease) in cash, cash equivalents and restricted cash Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash at the beginning of the year Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash, cash equivalents and restricted cash at the end of the year Supplemental cash flow activities: Supplemental Cash Flow Information [Abstract] Cash paid during the year for: Cash Paid During Period For [Abstract] Income taxes Income Taxes Paid Net Interest Interest Paid Net Organization Consolidation And Presentation Of Financial Statements [Abstract] Organization and Basis of Presentation Organization Consolidation And Presentation Of Financial Statements Disclosure [Text Block] Accounting Policies [Abstract] Significant Accounting Policies Significant Accounting Policies [Text Block] Cash Cash Equivalents And Short Term Investments [Abstract] Cash and Cash equivalents and Short-term investments Cash Cash Equivalents And Short Term Investments [Text Block] Receivables and prepaid expenses. Receivables and prepaid expenses. Receivables And Prepaid Expenses [Abstract] Receivables and Prepaid Expenses Receivables And Prepaid Expenses [Text Block] Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] Property Plant And Equipment [Abstract] Property and Equipment, Net Property Plant And Equipment Disclosure [Text Block] Field equipment. Field equipment. Field Equipment [Abstract] Field Equipment, Net Field Equipment Disclosure [Text Block] Payables And Accruals [Abstract] Other Payables and Accrued Expenses Accounts Payable Accrued Liabilities And Other Liabilities Disclosure Current [Text Block] Compensation And Retirement Disclosure [Abstract] Employee Benefit Obligations Compensation And Employee Benefit Plans [Text Block] Debt Disclosure [Abstract] Long-Term Loan, Net of Discount and Issuance Costs Debt Disclosure [Text Block] Other long term liabilities . Other Liabilities Disclosure [Abstract] Other Long-term Liabilities Other Long Term Liabilities Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingent Liabilities Commitments And Contingencies Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Share Based Compensation Allocation And Classification In Financial Statements [Abstract] Share Capital Shareholders Equity And Share Based Payments [Text Block] Interest And Debt Expense [Abstract] Financial Expenses, Net Interest Income And Interest Expense Disclosure [Text Block] Earnings Per Share [Abstract] Basic and Diluted Net Loss Per Share Earnings Per Share [Text Block] Subcontractor disclosure. Subcontractor. Subcontractor [Abstract] Subcontractor Subcontractor Disclosure [Text Block] Supplemental information. Geographic Areas Long Lived Assets [Abstract] Supplemental Information Supplemental Information [Text Block] Selected Quarterly Financial Information [Abstract] Selected Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Subsequent Events [Abstract] Subsequent Event Subsequent Events [Text Block] Significant accounting policies. Significant accounting policies. Significant Accounting Policies [Table] Significant Accounting Policies [Table] Property, Plant and Equipment, Type Property Plant And Equipment By Type [Axis] Property, Plant and Equipment, Type Property Plant And Equipment Type [Domain] Field equipment. Field Equipment Field Equipment [Member] Significant Accounting Policies [Line Items] Significant Accounting Policies [Line Items]