Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net loss	$ (21,968,000)	$ (46,781,000)	$ (55,560,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	22,417,000	7,138,000	1,744,000
Amortization of inventory fair market value adjustment	0	234,000	418,000
Loss on disposal of property and equipment	160,000	0	10,000
Depreciation and amortization	5,523,000	4,215,000	3,727,000
Noncash Lease Expense	1,621,000	0	0
Revaluation of warrants and derivative liabilities to estimated fair value	(319,000)	22,978,000	29,622,000
Revaluation of contingent consideration to estimated fair value	210,000	1,017,000	1,180,000
Amortization of debt discount and noncash interest expense	0	2,232,000	3,452,000
Non-cash goodwill impairment	0	0	1,958,000
Debt extinguishment expenses	0	5,831,000	274,000
Changes in operating assets and liabilities:
Accounts receivable	(12,675,000)	(3,967,000)	(109,000)
Inventory	(1,270,000)	363,000	1,025,000
Prepaid and other current assets	(829,000)	(502,000)	(84,000)
Accounts payable	1,351,000	(168,000)	292,000
Accrued compensation	3,115,000	4,291,000	1,065,000
Accrued and other liabilities	3,029,000	719,000	(1,233,000)
Operating lease liabilities	(1,854,000)
Change in deferred taxes	(1,280,000)	(1,607,000)	(2,088,000)
Net cash used in operating activities	(2,769,000)	(4,007,000)	(14,307,000)
Investing activities:
Additions of capital expenditures, net	(2,201,000)	(2,035,000)	(186,000)
Acquisition of intangible assets	(1,148,000)	(5,202,000)	0
Acquisition of business	(18,230,000)	(692,000)	(5,919,000)
Investment in equity securities	(1,000,000)	0	0
Net cash used in investing activities	(22,579,000)	(7,929,000)	(6,105,000)
Financing activities:
Proceeds from issuance of common stock, net of issuance costs	0	52,910,000	18,328,000
Proceeds from debt, net of issuance costs	0	14,282,000	24,002,000
Principal payments on debt and capital lease obligations	(172,000)	(28,089,000)	(14,359,000)
Change in short-term credit facility	0	(677,000)	0
Proceeds from exercise of warrants	105,000	10,998,000	989,000
Proceeds from exercise of stock options	3,553,000	1,480,000	262,000
Proceeds from issuance of common stock under employee stock purchase plan	760,000	287,000	94,000
Taxes paid related to net share settlement of restricted stock units	(4,153,000)	(698,000)	0
Change in bank overdraft obligation	0	0	63,000
Net cash (used in) provided by financing activities	(132,000)	50,268,000	29,379,000
Effect of exchange rate changes on cash and cash equivalents	(849,000)	2,000	106,000
Net increase (decrease) in cash, cash equivalents and restricted cash	(26,329,000)	38,334,000	9,073,000
Cash, cash equivalents, and restricted cash at beginning of period	64,808,000	26,474,000	17,401,000
Cash, cash equivalents, and restricted cash at end of period	38,479,000	64,808,000	26,474,000
Supplemental disclosures of cash information
Cash paid for interest	22,000	1,774,000	3,270,000
Supplemental disclosures of cash flow information
Shares issued in lieu of payment	209,000	0	1,145,000
Deferred purchase consideration	0	0	0
Accrued interest capitalized to debt principal	0	0	984,000
Deferred payments for intangible assets	7,207,000	0	0
Operating lease right of use assets	6,138,000
Purchased of capital expenditures in accounts payable and accrued liabilities	576,000	0	0
Issuance of common stock upon conversion of convertible debt	0	38,852,000	0
Offering costs included in accounts payable	0	361,000	0
ESPP shares included in accrued compensation	703,000	341,000	0
Common stock warrants issued upon debt financing	0	784,000	0
Contingent consideration	1,442,000	2,689,000	0
Cash, Cash Equivalents and Restricted Cash as of:
Total cash, cash equivalents, and restricted cash at the end of the period	38,479,000	64,808,000	17,401,000
Conexio
Financing activities:
Contingent payments related to acquisition	$ (225,000)	$ (225,000)	$ 0