Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	$ 23,958,000	$ 14,852,000
Prepaid expenses	4,130,000	3,664,000
Other receivables	8,497,000	8,531,000
Total current assets	36,585,000	27,047,000
Restricted cash	5,824,000	5,960,000
Property and equipment, net	9,250,000	3,617,000
Operating lease right-of-use asset	44,886,000	43,035,000
In-process research and development	10,256,000	10,256,000
Goodwill	3,490,000	3,490,000
Other assets	2,470,000	2,429,000
Total assets	112,761,000	95,834,000
Current liabilities
Accounts payable and accrued liabilities	6,700,000	6,034,000
Accrued compensation	1,741,000	1,828,000
Current portion of operating lease liabilities	13,443,000	17,011,000
Total current liabilities	21,884,000	24,873,000
Operating lease liabilities, net of current portion	28,162,000	31,804,000
Convertible debt	49,747,000
Long-term debt	22,277,000
Deferred tax liability	3,077,000	3,077,000
Total liabilities	125,147,000	59,754,000
Shareholders' (deficit) equity
Common stock, $0.01 par value; 217,000,000 shares authorized; 36,122,591 and 36,144,706 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively	361,000	361,000
Additional paid-in capital	276,225,000	275,493,000
Accumulated deficit	(288,972,000)	(239,774,000)
Total shareholders' (deficit) equity	(12,386,000)	36,080,000
Total liabilities and shareholders' (deficit) equity	$ 112,761,000	$ 95,834,000