Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net loss	$ (20,246)	$ (5,457)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	1,097	358
Amortization of inventory fair market value adjustment	1,225
Stock-based compensation	812	692
Amortization of deferred revenue	(31)	(59)
Amortization of debt discount and noncash interest expense	56	450
Revaluation of contingent consideration to estimated fair value	(310)	(111)
Revaluation of common stock warrant liability to estimated fair value	3,165	0
Changes in operating assets and liabilities:
Accounts receivable	(982)	981
Inventory	236	(45)
Prepaid and other assets	845	(108)
Accounts payable	(336)	(116)
Accrued payroll liabilities	39	367
Accrued royalties	18	27
Accrued and other liabilities	2,153	274
Net cash used in operating activities	(12,259)	(2,747)
Investing activities:
Purchase of property and equipment	(276)	(733)
Acquisition of business, net of cash acquired	(20,567)	0
Net cash used in investing activities	(20,843)	(733)
Financing activities:
Proceeds from debt, net of issuance costs	0	15,625
Proceeds from private placement and subsequent financing, net of issuance costs	20,619	0
Proceeds from issuance of common stock under employee stock purchase plan	175	0
Principal payments on debt and capital lease obligations	(428)	(11,724)
Proceeds from exercise of stock options	9	42
Net cash provided by financing activities	20,375	3,943
Effect of exchange rate changes on cash and cash equivalents	(17)	0
Net (decrease) increase in cash and cash equivalents	(12,744)	463
Cash and cash equivalents at beginning of period	29,888	36,431
Cash and cash equivalents at end of period	17,144	36,894
Supplemental disclosure of cash flow information:
Deferred purchase consideration	5,700	0
Debt assumed as part of acquisition	13,421	0
Common shares issued as part of acquisition	$ 7,205	$ 0