Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Cash flow from operating activities:
Net loss	$ (62,867)	$ (81,539)	$ (100,118)
Adjustments to reconcile net loss to net cash used in operations:
Depreciation and amortization	2,284	1,936
Non cash lease expense	(1)
Provision for doubtful accounts	235	(59)
Change in fair value of warrant liabilities	20,932	36,505
Share-based compensation expense	2,422	1,009
Change in fair value of contingent consideration	4,849	20,656
Change in fair value of contingent stock consideration	1,565
Other, net	96	(47)
Changes in assets and liabilities:
Accounts receivable	(1,112)	185
Inventory	(5,670)	(1,162)
Prepaid expenses and other assets	(348)	(780)
Accounts payable	1,334	85
Accrued expenses and other liabilities	1,937	(1,272)
Right-of-use assets and lease liabilities	52
Deferred revenue	39	(597)
Net cash used in operating activities	(34,253)	(25,080)
Cash flow from investing activities:
Capital expenditures	(1,454)	(1,479)
Net cash used in investing activities	(1,454)	(1,479)
Cash flow from financing activities:
Proceeds from the exercise of stock options	10
Proceeds from the exercise of warrants	46,485
Payments of PIPE/SPAC related costs		(4,842)
Net cash provided by (used in) financing activities	46,495	(4,842)
Net increase (decrease) in cash, cash equivalents and restricted cash	10,788	(31,401)
Cash, cash equivalents and restricted cash at beginning of period	52,076	69,513	69,513
Cash, cash equivalents and restricted cash at end of period	62,864	38,112	$ 52,076
Supplemental non-cash investing and financing activities:
Property and equipment included in accounts payable and accrued expenses	(1,015)	(287)
Reclassification of option liabilities to equity	$ 441
Change in PIPE/SPAC related costs captured in accounts payable and accrued expenses		$ 1,026