Stock Incentive Plans (Details Textual) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 31, 2007	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	May 30, 2019
Stock Incentive Plans (Textual)
Stock compensation expense		$ 6,000	$ 13,000	$ 13,000	$ 30,000
Unrecognized compensation cost		53,000	66,000	$ 53,000	66,000
Stock-based plan expect to recognize weighted-average period				1 year 2 months 30 days
Stock compensation expense related to restricted stock		$ 3,000	$ 4,000	$ 7,000	$ 61,000
Common stock reserved for future issuance of awards		328,660		328,660				49,000
Plan termination date				Mar. 17, 2026
Stock option intrinsic value		$ 53,977		$ 53,977
Stock options exercisable or outstanding		32,126		$ 32,126
Stock options forfeited rate percentage				28.99%
Number of restricted stock units granted				6,592
Restricted stock units, description				For the three and six months ended June 30, 2019, the Company recorded $7,000 and $7,000, respectively, of RSU expense
Outstanding non-vested restricted stock				2,454
Closing price, description				At the time the negotiation of the terms of the employment agreement began, the closing price of the common stock was $5.50. On the date of grant, the closing price of the common stock was $6.30.
Stock option expenses		$ 414,000
2007 Plan [Member]
Stock Incentive Plans (Textual)
Maximum number of shares awarded or sold	440,769
Plan termination date	Jun. 24, 2016
Restricted Stock Units (RSUs) [Member] | Key Executive [Member]
Stock Incentive Plans (Textual)
Number of restricted stock units granted						30,902	59,098
Restricted Stock [Member]
Stock Incentive Plans (Textual)
Restricted stock units, description					From January 1, 2018, to the 2018 Annual Meeting of Stockholders, the directors in the aggregate earned $15,000 in stock, which was equal to 1,878 shares of restricted common stock. Thereafter, at every Annual Meeting, beginning in 2018, non-employee directors receive $10,000 in RSUs which vest on the day immediately preceding the next following Annual Meeting of Stockholders.