CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 47,742	$ 51,612
Accounts receivable (less allowance for doubtful accounts of $20 at December 31, 2019 and 2018)	2,487	2,010
Unbilled receivables	3,315	3,279
Prepaid expenses and other current assets	256	284
Total current assets	53,800	57,185
Property and equipment, net	3,755	4,085
Deferred tax assets		5,171
Total assets	57,555	66,441
Current liabilities:
Accounts payable	187	126
Accrued expenses	1,096	1,319
Deferred revenue	2,777	3,024
Total current liabilities	4,060	4,469
Long-term deferred revenue	60	75
Commitments and contingent liabilities (Note 7)
Stockholders' equity:
Preferred stock, $1.00 par value; 1,000,000 shares authorized, none outstanding
Common stock, $.01 par value; shares authorized, 70,000,000 in 2019 and 2018; issued and outstanding 21,442,781 as of December 31, 2019 and 21,515,872 as of December 31, 2018	214	215
Additional paid-in capital	96,255	96,376
Accumulated deficit	(43,034)	(34,694)
Total stockholders' equity	53,435	61,897
Total liabilities and stockholders' equity	$ 57,555	$ 66,441