Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
CURRENT ASSETS
Cash and cash equivalents	$ 21,589	$ 24,968
Accounts receivable	315	208
Prepaid expenses and other current assets	537	511
TOTAL CURRENT ASSETS	22,441	25,687
PROPERTY AND EQUIPMENT
Property and equipment	4,992	4,892
Less: Accumulated depreciation and amortization	(3,520)	(3,309)
PROPERTY AND EQUIPMENT, NET	1,472	1,583
OTHER NONCURRENT ASSETS
Intangibles, net of accumulated amortization of $451 and $516, respectively	2,291	2,119
Restricted cash	105	105
Goodwill	852	911
Operating lease right-of-use assets	1,857	2,012
Finance lease right-of-use asset	191	201
Other assets	50	112
TOTAL OTHER NONCURRENT ASSETS	5,346	5,460
TOTAL ASSETS	29,259	32,730
CURRENT LIABILITIES
Accounts payable	1,016	982
Accrued expenses	232	449
Accrued salaries and payroll related expenses	2,142	1,970
Deferred revenue	1,262	1,721
Operating lease liabilities, current	662	699
Financing lease liabilities, current	39	30
TOTAL CURRENT LIABILITIES	5,353	5,851
LONG-TERM LIABILITIES
Deferred revenue	33	62
Operating lease liabilities, net of current portion	1,461	1,589
Financing lease liability, net of current portion	165	175
TOTAL LIABILITIES	7,012	7,677
Commitments and contingencies
STOCKHOLDERS’ EQUITY
Common stock, $0.001 par value, 100,000,000 authorized and 60,201,721 outstanding as of March 31, 2021 and 59,128,356 outstanding as of December 31, 2020	60	59
Preferred stock, $0.001 par value, 3,000,000 authorized and none outstanding as of March 31, 2021 and December 31, 2020	0	0
Additional paid-in capital	181,891	175,813
Accumulated other comprehensive income	25	87
Accumulated deficit	(159,729)	(150,906)
TOTAL STOCKHOLDERS’ EQUITY	22,247	25,053
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 29,259	$ 32,730