Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (7,383)	$ (5,527)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Stock-based compensation expense	2,887	5,062
Non-cash interest expense	2,530	3,080
Depreciation expense	3,594	3,033
Amortization of intangible assets	441	700
Gain on extinguishment of debt	0	(3,352)
Changes in operating assets and liabilities:
Accounts receivable	(4,611)	(3,780)
Contract asset	(794)	(20)
Inventory	551	3,734
Prepaid expenses and other assets	884	426
Accrued interest	(2,182)	36
Accrued payroll	(2,227)	69
Accounts payable, accrued expenses and other liabilities	199	(726)
Net cash (used in) provided by operating activities	(6,111)	2,735
Cash flows from investing activities:
Purchases of property and equipment	(3,306)	(2,112)
Net cash used in investing activities	(3,306)	(2,112)
Cash flows from financing activities:
Proceeds from issuance of common stock, net of costs	(129)	32,103
Cash portion of $16,160 reduction to debt principal and accrued exit fee	0	(10,100)
Payment of financing costs	(80)	(200)
Net payments related to vesting of restricted stock units	(110)	(462)
Net cash (used in) provided by financing activities	(319)	21,341
Net (decrease) increase in cash and cash equivalents	(9,736)	21,964
Cash and cash equivalents, beginning of period	25,217	23,760
Cash and cash equivalents, end of period	15,481	45,724
Supplemental disclosures of cash flow information:
Cash paid for interest	7,015	4,833
Purchases of property, plant and equipment included in accrued expenses and accounts payable	582	191
Issuance of common stock to reduce debt principal and accrued exit fees	0	6,060
Issuance of common stock to settle interest obligations	$ 0	$ 3,211