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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Current assets:    
Cash and cash equivalents $ 36,488 $ 59,680
Restricted cash 1,482 2,593
Accounts receivable 8,783 5,356
Prepaid expenses and other current assets 5,254 4,069
Total current assets 52,007 71,698
Property and equipment, net 239 256
Operating lease right-of-use asset 2,030 2,287
Other assets 1,019 1,084
Total assets 55,295 75,325
Current liabilities:    
Accounts payable 2,861 1,301
Accrued liabilities 9,234 10,198
Accrued compensation and benefits 3,079 4,859
Current deferred revenue 14,260 13,920
Current portion of term loan 1,481 2,591
Current portion of lease liability 1,190 1,148
Total current liabilities 32,105 34,017
Long-term deferred revenue 17,229 18,413
Lease liability 1,004 1,322
Total liabilities 50,338 53,752
Commitments and contingencies
Stockholders' equity:    
Preferred stock
#REF! 7 7
Additional paid-in capital 400,398 398,733
Accumulated deficit (395,448) (377,167)
Total stockholders' equity 4,957 21,573
Total liabilities and stockholders' equity $ 55,295 $ 75,325
Preferred stock, shares authorized (in shares) 10,000,000 10,000,000
Series X Convertible Preferred Stock    
Stockholders' equity:    
Preferred stock $ 0 $ 0
Preferred stock, shares authorized (in shares) 4,947,759 4,947,759