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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net loss $ (14,592) $ (17,046)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 7,233 2,393
Amortization of acquisition-related inventory step-up 1,829 586
Provision for bad debts, net of recoveries 134 (43)
Provision for excess and obsolete inventory 1,553 299
Share-based compensation expense 2,322 1,973
Amortization of debt discount and debt issuance costs 4,223 469
Gain on divestiture and sale of other assets, net of loss on disposal of assets (6,888) 0
Deferred income taxes (208) 0
Unrealized foreign currency transaction loss, net 2,071 0
Other 895 0
Changes in assets and liabilities, net of effects from acquisitions and divestitures:    
Accounts receivable 4,458 (5,832)
Inventories 12,392 7,904
Prepaid expenses and other assets (473) 765
Accounts payable (17,216) (14,916)
Accrued expenses, income taxes, and other 1,499 4,268
Net cash used in operating activities (768) (19,180)
Cash flows from investing activities:    
Acquisition-related escrow 0 (88,274)
Acquisitions, net of cash acquired (1,875) (9,063)
Purchases of property, plant and equipment (493) (613)
Proceeds from the sale of property, plant and equipment 145 0
Proceeds from the sale of divested assets 9,250 0
Proceeds from the sale of short-term investments 1,210 0
Purchases of intangible assets and additions to capitalized software costs (1,318) (224)
Net cash provided by (used in) investing activities 6,919 (98,174)
Cash flows from financing activities:    
Gross proceeds from the issuance of convertible senior notes 0 120,000
Payment of issuance costs related to convertible senior notes 0 (3,540)
Proceeds from the exercise of warrant to purchase common stock 0 8,644
Net borrowings on DigiCore bank facilities 45 0
Net repayments on revolving credit facility 0 (5,158)
Payoff of acquisition-related assumed liabilities 0 (2,633)
Principal payments under capital lease obligations (450) 0
Principal payments on mortgage bond (112) 0
Proceeds from stock option exercises and employee stock purchase plan, net of taxes paid on vested restricted stock units 329 315
Net cash provided by (used in) financing activities (188) 117,628
Effect of exchange rates on cash and cash equivalents 8 (214)
Net increase in cash and cash equivalents 5,971 60
Cash and cash equivalents, beginning of period 12,570 17,853
Cash and cash equivalents, end of period 18,541 17,913
Cash paid during the year for:    
Interest 3,598 106
Income taxes $ 57 $ 106