Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 58,824	$ 86,907
Restricted cash - current	6,716	9,127
Receivables, net	5,938	16,682
Unbilled receivables	3,235	4,426
Deferred costs - current	600	2,352
Prepaid expenses and other current assets	5,019	4,144
Total current assets	80,332	123,638
Long-term assets:
Property and equipment, net	3,785	2,273
Restricted cash - long-term	406	7,176
Goodwill	5,713	5,727
Intangible assets, net	2,346	3,561
Other assets	444	367
Operating lease right-of-use asset	656	1,959
Total assets	93,682	144,701
Current liabilities:
Accounts payable	1,001	1,287
Accrued compensation and benefits	2,343	4,723
Deferred revenue	441	20,954
Current portion of operating lease liability	595	434
Other accrued liabilities	5,953	9,012
Total current liabilities	10,333	36,410
Long-term liabilities:
Long-term debt, net	35,792	45,719
Long-term operating lease liability	932	1,403
Long-term finance lease liabilities	136	418
Other liabilities	934	0
Total liabilities	48,127	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 December 31, 2021 and 2020	0	0
Common stock, $0.0001 par value, 500,000,000 shares authorized; 20,680,186 and 17,543,218 shares issued and outstanding at December 31, 2021 and 2020, respectively	2	2
Additional paid-in capital	436,721	414,773
Accumulated deficit	(391,168)	(354,024)
Total stockholders' equity	45,555	60,751
Total liabilities and stockholders' equity	$ 93,682	$ 144,701