CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash	$ 22,066	$ 30,393
Restricted cash	109	35
Accounts receivable, net	6,010	5,996
Inventory	9,863	9,554
Prepaid expenses and other current assets	3,030	1,450
Total current assets	41,078	47,428
Property and equipment, net	1,155	1,200
Intangible assets, net	17,617	18,466
Other assets	76	76
Total assets	59,926	67,170
Current liabilities:
Accounts payable	1,715	1,582
Accrued expenses	5,750	6,375
Payables to tissue suppliers	2,884	2,467
Current portion of long-term debt	8,059	8,059
Current portion of revenue interest obligation	2,750	2,750
Revolving line of credit	6,160	4,763
Other current liabilities		5
Total current liabilities	27,318	26,001
Long-term debt	8,758	10,410
Long-term revenue interest obligation	16,520	16,540
Other long-term liabilities	771	698
Total liabilities	53,367	53,649
Commitments and contingencies (Note 8)
Stockholders' equity (deficit):
Additional paid-in capital	119,786	118,599
Accumulated deficit	(113,240)	(105,091)
Total stockholders' equity	6,559	13,521
Total liabilities and stockholders' equity	59,926	67,170
Class A Common stock
Stockholders' equity (deficit):
Common stock	9	9
Class B Common stock
Stockholders' equity (deficit):
Common stock	$ 4	$ 4