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Shareholders' Equity (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended								6 Months Ended		12 Months Ended
	Jun. 30, 2018	Apr. 30, 2017	Mar. 31, 2017	Apr. 30, 2015	Sep. 30, 2014	Aug. 31, 2014	Jun. 30, 2010	Sep. 30, 2004	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2013
Sale of stock common, shares	346,000	30,000	200,000
Common stock at purchase price per share	$ 4.50	$ 7.78	$ 7.85							$ 4.50
Proceeds from offering expenses	$ 1,375	$ 219	$ 1,554
Stock-based compensation											$ 443	$ 457
Option exercised during period, value
Weighted average grant-date fair value per share price											$ 3.90	$ 5.87
Unamortized compensation expense									$ 61		$ 61
Unamortized compensation expense remaining service period											1 year 7 days
Restricted stock units vested and settled											13,000
Common stock issued, withholding taxes											9,000
Preferred stock series A, shares authorized									156,000		156,000	156,000
Preferred stock series A, shares issued									156,000		156,000	156,000
Preferred stock series A, shares outstanding									156,000		156,000	156,000
Payment of dividends											$ 16	$ 16
Number of shares converted
Series A Cumulative Convertible Preferred Stock [Member]
Preferred Stock, Liquidation Preference Per Share									$ 1.00		$ 1.00
Debt instrument, conversion price									13.439		$ 13.439
Common Stock [Member]
Number of shares converted											12,000
Restricted Stock Units (RSUs) [Member]
Weighted average grant-date fair value per share price											$ 5.13
Number of shares granted											74,000
Number of shares granted, description											During the year ended December 31, 2018, the Company granted approximately 74,000 restricted stock units with a weighted average grant date fair value of $5.13 per restricted stock unit, all of which vest as to 16.67% of the total underlying shares on the six month anniversary of the grant date and as to the balance of the total underlying shares in 30 substantially equal monthly installments, beginning on the seven month anniversary of the grant date, subject to accelerated vesting in the event of a change in control.
Warrants [Member]
Warrants issued to purchase number of common stock													72,000
Fair value of the warrants													$ 1,379
Warrants [Member] | Risk Free Interest Rate [Member]
Fair value assumptions, measurement input, percentages													1.06%
Warrants [Member] | Dividend Yield [Member]
Fair value assumptions, measurement input, percentages													0.00%
Warrants [Member] | Expected Volatility [Member]
Fair value assumptions, measurement input, percentages													80.25%
Warrants [Member] | Expected Term [Member]
Fair value assumptions, measurement input, term													5 years
Series A Convertible Preferred Stock [Member]
Cumulative preferred stock dividend price per share									$ 0.10	$ 0.10
Six Month Anniversary [Member] | Restricted Stock Units (RSUs) [Member]
Number of restricted stock vesting, percentage											16.67%
Chief Executive Officer [Member] | Restricted Stock Units (RSUs) [Member]
Number of shares granted											25,000
Chief Financial Officer [Member] | Restricted Stock Units (RSUs) [Member]
Number of shares granted											15,000
2004 Performance Incentive Plan [Member]
Maximum number of shares authorized to issue								50,000
2010 Amended Performance Incentive Plan [Member]
Maximum number of shares authorized to issue							120,000
Incentive plan expiry description							The Amended 2010 Plan expires in February 2020.
Options outstanding									62,000		62,000
Number of option available for grants									47,000		47,000
2010 Amended Performance Incentive Plan [Member] | Minimum [Member]
Maximum number of shares authorized to issue							120,000
2010 Amended Performance Incentive Plan [Member] | Maximum [Member]
Maximum number of shares authorized to issue							240,000
2014 Inducement Plan [Member]
Maximum number of shares authorized to issue						85,000
Incentive plan expiry description						The 2014 Plan expires in September 2024.
2014 Inducement Plan [Member] | First Anniversary [Member]
Option expected to vest during period, percentage				25.00%
2014 Inducement Plan [Member] | 36 substantially equal monthly installments thereafter [Member]
Option expected to vest during period, percentage				75.00%
2014 Inducement Plan [Member] | Mr Krishnan [Member]
Option issued to purchase number of additional common stock				15,000	70,000

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