Consolidated Statements of Cash Flows - USD ($)	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net loss	$ (9,641,741)	$ (11,696,886)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities
Restricted stock expense	66,963	201,998
Depreciation	280,003	291,608
Loss on disposition of equipment	1,167	0
Option expense	661,369	840,303
Changes in:
Other current assets	429,620	394,746
Accounts payable	315,685	(324,156)
Accrued expenses	(157,964)	621,493
Deferred revenue	1,169,964	(964,209)
Other assets	29,205	128,992
Net cash used in operating activities	(6,845,729)	(10,506,111)
Cash flows from investing activities
Purchase of property & equipment	(69,944)	(149,187)
Net cash used in investing activities	(69,944)	(149,187)
Cash flows from financing activities
Common stock and warrants sold for cash, net of offering costs	12,602,418	648,175
Cash generated from exercise of warrants	4,410	0
Cash paid for fractional shares	(5,028)	0
Net cash provided by financing activities	12,601,800	648,175
Net change in cash and cash equivalents	5,686,127	(10,007,123)
Cash and cash equivalents at beginning of period	9,906,373	23,644,542
Cash and cash equivalents at end of period	15,592,500	13,637,419
Cash paid for:
Interest	50	958
Income taxes	$ 0	$ 0