Equity Incentive Plans (Details Textual) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended					12 Months Ended
	Sep. 14, 2018	Apr. 23, 2018	May 31, 2017	May 31, 2016	May 31, 2014	Aug. 31, 2012	Dec. 31, 2018	Jun. 30, 2018	May 31, 2010	May 31, 2007	May 31, 2005
COO [Member]
Equity Incentive Plans (Textual)
Stock price		$ 1.05
Restricted common stock, Shares		100
Restricted stock forfeited, Shares	400
AMW [Member]
Equity Incentive Plans (Textual)
Warrant to purchase						100
Warrant exercisable per share						$ 1.09
Warrant vested, description						The warrant vested one-third (1/3) on May 23, 2013, one-third (1/3) on May 23, 2014 and one-third (1/3) on May 23, 2015.
Restricted Stock [Member]
Equity Incentive Plans (Textual)
Common stock to its employees and directors							476
Fair value option							$ 506
Stock options [Member]
Equity Incentive Plans (Textual)
Stock price							$ 1.11
Common stock to its employees and directors							1,546
Fair value option							$ 1,051
2016 Employee Plan [Member] | Stock options [Member]
Equity Incentive Plans (Textual)
Maximum equity based shares authorized				1,000
Employee plan expiry date				Feb. 04, 2026
Common stock shares increased			100
2016 Employee Plan [Member] | Stock appreciation rights [Member]
Equity Incentive Plans (Textual)
Common stock shares increased			250
Two Zero One Six Director Equity Incentive Plan [Member]
Equity Incentive Plans (Textual)
Maximum equity based shares authorized				400
Employee plan expiry date				Feb. 04, 2026
Two Zero Zero Five Director Equity Incentive Plan [Member]
Equity Incentive Plans (Textual)
Maximum equity based shares authorized					600				400		200
Restatement of employee plan extend term					Feb. 07, 2024
Two Zero Zero Five Employee Equity Incentive Plan [Member]
Equity Incentive Plans (Textual)
Maximum equity based shares authorized					2,600			2,700	1,600	1,100	500
Restatement of employee plan extend term					Feb. 07, 2024
2016 Employee Plan [Member]
Equity Incentive Plans (Textual)
Maximum equity based shares authorized								3,000