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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash flows from operating activities:    
Net loss $ (28,151) $ (14,592)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 7,662 7,233
Amortization of acquisition-related inventory step-up 0 1,829
Provision for bad debts, net of recoveries 732 134
Impairment of abandoned product line, net of recoveries 1,407 0
Provision for excess and obsolete inventory 172 1,553
Share-based compensation expense 1,979 2,322
Amortization of debt discount and debt issuance costs 5,082 4,223
Loss on disposal of assets, net of gain on divestiture and sale of other assets 171 (6,888)
Deferred income taxes (15) (208)
Unrealized foreign currency transaction loss, net (57) (2,071)
Other 494 895
Changes in assets and liabilities, net of effects from divestiture:    
Restricted cash (2,511) 0
Accounts receivable (4,972) 4,458
Inventories 2,844 12,392
Prepaid expenses and other assets (2,205) (473)
Accounts payable 7,194 (17,216)
Accrued expenses, income taxes, and other (5,391) 1,499
Net cash used in operating activities (15,451) (768)
Cash flows from investing activities:    
Installment payments related to past acquisitions 0 1,875
Purchases of property, plant and equipment (1,444) (493)
Proceeds from the sale of property, plant and equipment 182 145
Proceeds from the sale of divested assets 0 9,250
Proceeds from the sale of short-term investments 0 (1,210)
Purchases of intangible assets and additions to capitalized software development costs (1,500) (1,318)
Net cash provided by (used in) investing activities (2,762) 6,919
Cash flows from financing activities:    
Proceeds from term loan 18,000 0
Payment of issuance costs related to term loan (424) 0
Net borrowings from DigiCore bank and overdraft facilities 581 45
Principal payments under capital lease obligations (462) (450)
Principal payments on mortgage bond (142) (112)
Taxes paid on vested restricted stock units, net of proceeds from stock option exercises and employee stock purchase plan (731) 329
Net cash provided by (used in) financing activities 16,822 (188)
Effect of exchange rates on cash and cash equivalents 352 8
Net increase (decrease) in cash and cash equivalents (1,039) 5,971
Cash and cash equivalents, beginning of period 9,894 12,570
Cash and cash equivalents, end of period 8,855 18,541
Cash paid during the year for:    
Interest 3,757 3,598
Income taxes 88 57
Supplemental disclosures of non-cash activities:    
Transfer of inventories to rental assets 2,750 2,319
Issuance of common stock under amended earn-out agreement 2,638 0
Additional debt discount on convertible senior notes $ 3,600 $ 0