Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Beginning balance at Dec. 31, 2016		$ 14,700	$ 78,512,200	$ (82,449,800)	$ (3,922,900)
Beginning balance, shares at Dec. 31, 2016		9,804,400
Vesting of restricted stock awards
Stock-based compensation expense			18,500		18,500
Net loss				(166,200)	(166,200)
Ending balance at Jun. 30, 2017		$ 14,700	78,417,500	(82,616,000)	(4,070,600)
Ending balance, shares at Jun. 30, 2017		9,804,400
Beginning balance at Dec. 31, 2017		$ 14,700	78,525,600	(81,849,200)	(3,308,900)
Beginning balance, shares at Dec. 31, 2017		9,804,400
Vesting of restricted stock awards
Stock-based compensation expense
Issuance of new warrants			699,400		699,400
Cumulative effect from change of accounting principal				1,391,900	1,391,900
Net loss				121,000	121,000
Ending balance at Jun. 30, 2018		$ 14,700	$ 79,225,000	$ (80,336,300)	$ (1,096,600)
Ending balance, shares at Jun. 30, 2018		9,804,400