Subsequent Events (Details) - USD ($)				1 Months Ended	3 Months Ended	12 Months Ended
	Jan. 26, 2018	Jan. 02, 2018	Feb. 13, 2017	Jan. 31, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 21, 2018
Subsequent Event [Line Items]
Stock based compensation						$ 14,000	$ 17,000	$ 12,000
Proceeds from rights offering						2,699,000
Sale of facility						7,000	44,000
Rights [Member]
Subsequent Event [Line Items]
Common stock, New shares issued			4,498,698
Shares issued for rights offering, shares			4,498,698
Subsequent Event [Member]
Subsequent Event [Line Items]
Sale of facility	$ 2,650,000			$ 2,650,000
Directors And CEO [Member]
Subsequent Event [Line Items]
Stock based compensation						14,000	$ 14,000
Directors, CFO And Interim CEO [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock, New shares issued		4,569
Shares issued for rights offering, shares		4,569
Directors, Management, And Affiliates [Member] | Rights [Member]
Subsequent Event [Line Items]
Common stock, New shares issued			3,293,407
Shares issued for rights offering, shares			3,293,407
Scenario, Forecast [Member]
Subsequent Event [Line Items]
Gain on sale of assets					$ 1,100,000
Scenario, Forecast [Member] | Directors, CFO And Interim CEO [Member]
Subsequent Event [Line Items]
Stock based compensation					$ 4,000
Prosperity Bank [Member]
Subsequent Event [Line Items]
Credit facility current borrowing capacity						$ 1,250,000
Prosperity Bank [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Credit facility current borrowing capacity									$ 2,000,000