CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 46,857,000	$ 47,742,000
Accounts receivable, net	1,939,000	2,487,000
Unbilled receivables	3,225,000	3,315,000
Prepaid expenses and other current assets	340,000	256,000
Total current assets	52,361,000	53,800,000
Property and equipment, net	3,909,000	3,755,000
Long-term tax receivable	146,000
Total assets	56,416,000	57,555,000
Current liabilities:
Accounts payable	215,000	187,000
Accrued expenses	1,176,000	1,096,000
Deferred revenue	2,573,000	2,777,000
Total current liabilities	3,964,000	4,060,000
Long-term deferred revenue	44,000	60,000
Commitments and contingent liabilities
Stockholders' equity:
Preferred stock, $1.00 par value; 1,000,000 shares authorized, none outstanding
Common stock, $.01 par value; 70,000,000 shares authorized; issued and outstanding 21,521,886 as of March 31, 2020 and 21,442,781 as of December 31, 2019	215,000	214,000
Additional paid-in capital	96,287,000	96,255,000
Accumulated deficit	(44,094,000)	(43,034,000)
Total stockholders' equity	52,408,000	53,435,000
Total liabilities and stockholders' equity	$ 56,416,000	$ 57,555,000