CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 8,332,909	$ 6,013,382
Marketable securities	3,090,791	7,420,042
Accounts receivable, net of allowances of $170,263 and $191,285, respectively	5,201,908	6,635,262
Prepaid expenses and other current assets	1,509,641	1,742,668
Inventory	30,029	70,534
Deferred tax assets, net	213,140	205,816
Total current assets	18,378,418	22,087,704
Property and equipment, net of accumulated depreciation of $18,200,935 and $17,947,675, respectively	1,456,242	1,565,932
Deferred tax assets, net	117,067	110,060
Software development costs, net	866,323	1,116,816
Other assets	1,030,568	1,139,377
Goodwill	4,150,339	4,150,339
Other intangible assets, net	235,339	256,137
Total assets	26,234,296	30,426,365
Current liabilities:
Accounts payable	1,104,108	1,005,944
Accrued expenses	5,790,053	6,783,514
Deferred tax liabilities, net	89,491	89,343
Deferred revenue, net	16,747,873	16,553,519
Total current liabilities	23,731,525	24,432,320
Other long-term liabilities	895,208	735,089
Deferred tax liabilities, net	34,054	27,069
Deferred revenue, net	8,993,916	9,122,289
Total liabilities	$ 33,654,703	$ 34,316,767
Commitments and contingencies
Series A redeemable convertible preferred stock, $.001 par value, 2,000,000 shares authorized, 900,000 shares issued and outstanding, redemption value of $9,000,000	$ 7,982,223	$ 7,818,554
Stockholders' deficit:
Common stock - $.001 par value, 100,000,000 shares authorized, 57,805,087 and 57,194,817 shares issued, respectively and 42,277,017 and 41,666,747 shares outstanding, respectively	57,805	57,195
Additional paid-in capital	168,776,399	167,953,871
Accumulated deficit	(125,280,503)	(120,983,891)
Common stock held in treasury, at cost (15,528,070 and 15,528,070 shares, respectively)	(57,032,917)	(57,032,917)
Accumulated other comprehensive loss, net	(1,923,414)	(1,703,214)
Total stockholders' deficit	(15,402,630)	(11,708,956)
Total liabilities and stockholders' deficit	$ 26,234,296	$ 30,426,365