Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net loss	$ (1,604,464)	$ (4,265,115)
Adjustments to reconcile net loss to net cash used in operating activities:
Shares issued for services	0	161,634
Depreciation	0	138,242
Option expense	96,554	342,713
Changes in:
Other current assets	215,592	209,297
Accounts payable	(371,092)	(162,024)
Accrued expenses	(290,739)	447,049
Deferred revenue	0	(1,452,582)
Other long-term assets	0	6,752
Net cash used in operating activities	(1,954,149)	(4,574,034)
Cash flows from investing activities
Proceeds from sale of property & equipment	50,000	(1,221)
Net cash provided/(used) in investing activities	50,000	(1,221)
Cash flows from financing activities
Common stock sold for cash net of offering cost	413,662	0
Note payable - insurance	(130,110)	(110,868)
Payment of deferred offering costs	0	(50,281)
Net cash provided/(used) in financing activities	283,552	(161,149)
Net change in cash and cash equivalents	(1,620,597)	(4,736,404)
Cash and cash equivalents at beginning of period	3,444,952	12,583,764
Cash and cash equivalents at end of period	1,824,355	7,847,360
Cash paid for:
Interest	1,796	2,155
Income taxes	0	0
Non-cash transactions
Subscription receivable – exercise of warrants	$ 0	$ 57,985