Consolidated Balance Sheets - USD ($)	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 18,283,560	$ 9,906,373
Other current assets	403,634	758,943
Total current assets	18,687,194	10,665,316
Property & equipment, net of accumulated depreciation of $2,290,373 and $2,099,389, respectively	918,899	1,098,104
Other long-term assets	19,469	38,939
Total assets	19,625,562	11,802,359
Current liabilities:
Accounts payable	1,148,728	702,494
Accrued expenses	900,492	1,199,184
Deferred revenue	2,905,165	1,230,746
Total current liabilities	4,954,385	3,132,424
Long term liabilities:
Deferred revenue, net of current portion	1,452,584	1,230,748
Total liabilities	6,406,969	$ 4,363,172
Commitments and contingencies
Stockholders' equity:
Preferred stock, no par value, 10,000,000 shares authorized, none issued and outstanding	0	$ 0
Common stock, $0.01 par value, 100,000,000 shares authorized, 53,386,543 and 28,234,751 shares issued and outstanding	533,866	282,348
Additional paid in capital	160,852,696	148,477,047
Accumulated deficit	(148,167,969)	(141,320,208)
Total stockholders' equity	13,218,593	7,439,187
Total liabilities and stockholders' equity	$ 19,625,562	$ 11,802,359