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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash flows from operating activities:    
Net loss $ (33,148) $ (37,893)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization 10,836 4,484
Amortization of acquisition-related inventory step-up 1,829 765
Provision for bad debts, net of recoveries 96 62
Provision for excess and obsolete inventory 2,580 810
Share-based compensation expense 3,437 3,227
Amortization of debt discount and debt issuance costs 6,335 2,581
Gain on divestiture and sale of other assets, net of loss on disposal of assets (4,290) 0
Loss on impairment of purchased intangible assets 2,594 0
Non-cash change in acquisition-related escrow 0 10,317
Deferred income taxes (735) 0
Non-cash earn-out compensation expense 2,109 0
Unrealized foreign currency transaction loss, net 3,038 0
Other 183 0
Changes in assets and liabilities, net of effects from acquisitions and divestitures:    
Accounts receivable 9,881 (6,664)
Inventories 3,757 6,039
Prepaid expenses and other assets (6,186) (574)
Accounts payable (7,077) (13,868)
Accrued expenses, income taxes, and other 4,812 4,417
Net cash provided by (used in) operating activities 51 (26,297)
Cash flows from investing activities:    
Acquisition-related escrow 0 (88,274)
Acquisitions, net of cash acquired (3,750) (9,063)
Purchases of property, plant and equipment (875) (996)
Proceeds from the sale of property, plant and equipment 392 0
Proceeds from the sale of divested assets 11,300 0
Proceeds from the sale of short-term investments 1,210 0
Purchases of intangible assets and additions to capitalized software costs (2,092) (224)
Net cash provided by (used in) investing activities 6,185 (98,557)
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 repayments of DigiCore bank facilities (965) 0
Net repayments of revolving credit facility 0 (5,158)
Payoff of acquisition-related assumed liabilities 0 (2,633)
Principal payments under capital lease obligations (722) 0
Principal payments on mortgage bond (175) 0
Proceeds from stock option exercises and employee stock purchase plan, net of taxes paid on vested restricted stock units 368 257
Net cash provided by (used in) financing activities (1,494) 117,570
Effect of exchange rates on cash and cash equivalents (147) (350)
Net increase (decrease) in cash and cash equivalents 4,595 (7,634)
Cash and cash equivalents, beginning of period 12,570 17,853
Cash and cash equivalents, end of period 17,165 10,219
Cash paid during the year for:    
Interest 3,712 110
Income taxes $ 92 $ 123