CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 32,756	$ 48,767
Restricted cash	6,251	6,842
Investments	51,330	55,199
Accounts receivable, net of allowance for doubtful accounts of $276 and $416, respectively	18,158	17,618
Inventory	16,693	12,529
Prepaid expenses and other	1,861	4,296
Total current assets	127,049	145,251
Property and equipment, net	62,881	38,398
Operating lease right-of-use assets	15,193	15,614
Finance lease right-of-use assets	42	64
Intangible assets, net	2,859	2,054
Total assets	208,024	201,381
Current liabilities:
Accounts payable and accrued expenses	22,459	21,968
Current maturities of long-term lease obligations	1,834	863
Total current liabilities	24,293	22,831
Long-term debt, net of financing fees	44,821	32,027
Long-term lease obligations	20,798	20,874
Debt derivative liabilities	5,562	2,497
Other long-term liabilities	0	3
Total liabilities	95,474	78,232
Commitments and contingencies - see Note 14
Shareholders’ equity:
Common stock, $0.01 par value per share; 100,000,000 shares authorized; 41,736,950 and 40,618,766 shares issued and outstanding	417	406
Additional paid-in capital	342,765	326,390
Accumulated deficit	(230,632)	(203,647)
Total shareholders’ equity	112,550	123,149
Total liabilities and shareholders’ equity	$ 208,024	$ 201,381