Capital Stock, Stock Plans and Stock-Based Compensation - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Allocated stock-based compensation	$ 45	$ 52	$ 129	$ 143
Employee Stock Options [Member]
Allocated stock-based compensation	35	37	114	110
Director Stock Options [Member]
Allocated stock-based compensation	$ 10	$ 15	$ 15	$ 33