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Stockholders' Equity (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
Stockholders' Equity (Details Textual) - USD ($)	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Common Stock, Shares Authorized	62,500,000
Preferred Stock, Shares Authorized	2,000,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 472,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	222,000		400,000
Stock Option Plan Description	The Consultant Plan provides for quarterly increases in the available number of authorized shares equal to the lesser of 1% of any new shares issued by the Company during the quarter immediately prior to the adjustment date or such lesser amount as the Board of Directors shall determine.
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$ 0
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 1.80
Warrants Intrinsic Value Outstanding	$ 0
Warrants Authorized For Issuance To Acquire Common Stock Shares Number	2,415,784
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	80,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	900,399		587,962
Stock Issued During Period In Lieu of Cash Bonus			159,100
Warrants and Rights Remaining Term	1 year 10 months 17 days
Employee Stock Option [Member]
Class of Stock [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 219,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term2	10 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 2.25
Allocated Share-based Compensation Expense	$ 110,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period1	2 years
Employee Stock Option [Member] \| Minimum [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 1.16
Consultant Plan [Member]
Class of Stock [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	253,317
Consultant Plan Expenses	$ 3,000	$ 9,000
Shares Reserved Unissued	197,567
Consultant Plan [Member] \| Employee Stock Option [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	329,000
Consultant Plan One [Member] \| Employee Stock Option [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	126,000	50,000
Consultant Plan Two [Member]
Class of Stock [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 1.44
Share Based Compensation Arrangement By Share Based Payment Award Options Value Grants In Period Weighted Average Grant Date Fair Value	$ 14,000
Equity Incentive Plan [Member]
Class of Stock [Line Items]
Common Stock, Capital Shares Reserved for Future Issuance	2,180,367
Increase Decrease Of Share Based Compensation Arrangement By Share Based Payment Award Percentage	10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	559,100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 1.21
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term2	10 years
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 2.25
Allocated Share-based Compensation Expense	$ 74,000
Share-based Compensation Outstanding - Reserved but unissued shares under the Plan	1,436,540		880,277
Shares Reserved Unissued	743,827
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period1	2 years 2 months 12 days