CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (32,704)	$ (18,104)
Adjustments to reconcile net loss to net cash flows used in operating activities:
Effect of change in revenue recognition	0	(17,382)
Share-based compensation	11,452	9,199
Loss on extinguishment of debt	8,201	0
Depreciation	4,494	4,981
Amortization of intangible assets	818	769
Amortization of deferred financing costs	1,811	752
Bad debt expense	616	0
Non-cash lease expenses	702	714
Reserve for inventory obsolescence	(171)	413
Loss on fixed asset disposal	0	318
Impairment of intangible assets	0	1,258
Increase (decrease) in cash resulting from changes in:
Accounts receivable	(1,331)	0
Inventory	(1,748)	3,539
Prepaid expenses	5,177	4,778
Income taxes	(10,835)	(389)
Other assets	1,633	(3,515)
Accounts payable	339	(5,444)
Accrued compensation	(2,775)	(1,948)
Accrued expenses	(4,835)	5,596
Other liabilities	(840)	(1,825)
Net cash flows used in operating activities	(19,996)	(16,290)
Cash flows from investing activities:
Purchases of equipment	(2,073)	(1,055)
Principal payments from note receivable	0	2,722
Patent application costs	(209)	(370)
Net cash flows (used in) provided by investing activities	(2,282)	1,297
Cash flows from financing activities:
Proceeds from exercise of stock options	370	108
Stock repurchased for tax withholdings on vesting of restricted stock	(2,409)	(1,283)
Deferred financing cost	(2,782)	(6,640)
Proceeds from term loans	59,500	72,750
Repayment of term loans	(83,872)	(938)
Prepayment premium on early repayment of term loan	(1,439)	0
Proceeds from sale of Series B convertible preferred stock	100,000	0
Stock issuance costs	(6,564)	0
Net cash flows provided by financing activities	62,804	63,997
Net change in cash	40,526	49,004
Cash and cash equivalents, beginning of period	69,069	45,118
Cash and cash equivalents, end of period	$ 109,595	$ 94,122