Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 21,206	$ 24,968
Accounts receivable	48	208
Prepaid expenses and other current assets	636	511
Restricted cash	55	0
TOTAL CURRENT ASSETS	21,945	25,687
NONCURRENT ASSETS
Property and equipment, net	1,306	1,583
Intangibles, net	2,639	2,119
Restricted cash	0	105
Goodwill	878	911
Operating lease right-of-use assets	1,380	2,012
Financing lease right-of-use asset	160	201
Other assets	53	112
TOTAL NONCURRENT ASSETS	6,416	7,043
TOTAL ASSETS	28,361	32,730
CURRENT LIABILITIES
Accounts payable	1,144	982
Accrued expenses	308	449
Accrued salaries and payroll related expenses	3,079	1,970
Deferred revenue, current portion	1,907	1,721
Operating lease liabilities, current	525	699
Financing lease liability, current	41	30
TOTAL CURRENT LIABILITIES	7,004	5,851
LONG-TERM LIABILITIES
Deferred revenue, net of current portion	4,889	62
Operating lease liabilities, net of current portion	1,078	1,589
Financing lease liability, net of current portion	134	175
TOTAL LIABILITIES	13,105	7,677
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 100,000,000 authorized and 66,999,853 outstanding as of December 31, 2021 and 59,128,356 outstanding as of December 31, 2020	67	59
Preferred stock, $0.001 par value, 3,000,000 shares authorized and none outstanding as of December 31, 2021 and December 31, 2020	0	0
Additional paid-in capital	202,014	175,813
Accumulated other comprehensive income	51	87
Accumulated deficit	(186,876)	(150,906)
TOTAL STOCKHOLDERS’ EQUITY	15,256	25,053
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 28,361	$ 32,730