Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 75,303	$ 86,907
Restricted cash - current	8,954	9,127
Receivables, net	5,203	16,682
Unbilled receivables	5,260	4,426
Deferred costs - current	1,207	2,352
Prepaid expenses and other current assets	2,734	4,144
Total current assets	98,661	123,638
Long-term assets:
Property and equipment, net	5,474	2,273
Restricted cash - long-term	510	7,176
Goodwill	5,713	5,727
Intangible assets, net	2,651	3,561
Other assets	1,120	367
Operating lease right-of-use assets	1,692	1,959
Total assets	115,821	144,701
Current liabilities:
Accounts payable	1,135	1,287
Accrued compensation and benefits	3,623	4,723
Deferred revenue	5,321	20,954
Current portion of operating lease liabilities	546	434
Other accrued liabilities	5,270	9,012
Total current liabilities	15,895	36,410
Long-term liabilities:
Long-term debt, net	46,353	45,719
Long-term operating lease liabilities	1,082	1,403
Long-term finance lease liabilities	192	418
Total liabilities	63,522	83,950
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 50,000,000 shares authorized; 3,770,265 shares issued and outstanding at each of September 30, 2021 and December 31, 2020	0	0
Common stock, $0.0001 par value; 500,000,000 shares authorized; 19,155,481 and 17,543,218 shares issued and outstanding at September 30, 2021 and December 31, 2020, respectively	2	2
Additional paid-in capital	423,414	414,773
Accumulated deficit	(371,117)	(354,024)
Total stockholders' equity	52,299	60,751
Total liabilities and stockholders' equity	$ 115,821	$ 144,701