CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 48,767	$ 35,724
Restricted cash	6,842	6,000
Investments	55,199	60,786
Accounts receivable, net of allowance for doubtful accounts of $416 and $1,092, respectively	17,618	16,944
Inventory	12,529	13,861
Prepaid expenses and other	4,296	1,706
Total current assets	145,251	135,021
Property and equipment, net	38,398	14,887
Operating lease right-of-use assets	15,614	3,133
Finance lease right-of-use assets	64	87
Intangible assets	2,054	1,515
Total assets	201,381	154,643
Current liabilities:
Accounts payable and accrued expenses	21,968	19,144
Current maturities of lease liabilities	863	1,736
Total current liabilities	22,831	20,880
Long-term debt, net of financing fees	32,027	0
Long-term lease obligations	20,874	1,595
Debt derivative liability	2,497	0
Other long-term liabilities	3	15
Total liabilities	78,232	22,490
Commitments and contingencies - see Note 15
Shareholders’ equity:
Common stock, $0.01 par value per share; 100,000,000 shares authorized; 40,618,766 and 39,589,755 shares issued and outstanding	406	396
Additional paid-in capital	326,390	311,618
Accumulated deficit	(203,647)	(179,861)
Total shareholders’ equity	123,149	132,153
Total liabilities and shareholders’ equity	$ 201,381	$ 154,643