Consolidated Balance Sheets - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 12,583,764	$ 9,906,373
Other current assets	995,067	758,943
Total current assets	13,578,831	10,665,316
Property & equipment, net of accumulated depreciation of $2,443,600 and $2,099,389, respectively	837,867	1,098,104
Other long-term assets	0	38,939
Total assets	14,416,698	11,802,359
Current liabilities:
Accounts payable	739,850	702,494
Accrued expenses	1,008,077	1,049,513
Deferred revenue	2,905,165	1,230,746
Notes payable - Insurance	148,344	149,671
Total current liabilities	4,801,436	3,132,424
Long term liabilities:
Deferred revenue	0	1,230,748
Total liabilities	4,801,436	4,363,172
Stockholders' equity:
Preferred stock, no par value, 10,000,000 shares authorized, none issued and outstanding	0	0
Common stock, $0.01 par value, 150,000,000 shares authorized, 6,982,909 and 3,529,344 shares issued and outstanding	69,829	35,293
Additional paid in capital	162,884,919	148,724,102
Accumulated deficit	(153,339,486)	(141,320,208)
Total stockholders' equity	9,615,262	7,439,187
Total liabilities and stockholders' equity	$ 14,416,698	$ 11,802,359