Retirement-related Benefits (Details Narrative) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Employee	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Benefit obligation	$ 1,000
Discount rate	3.62%
Target allocation of assets	5.00%
Percentage of employer's contribution	100.00%
Percentage of employer's matching contribution	1.00%
Employer's matching contribution, amount	$ 200	$ 200	$ 200
Number of active employees under defined benefit plan | Employee	14
Number of retired employees under defined benefit plan | Employee	14
Number of terminated employees under defined benefit plan | Employee	8
Cash contribution under plan	$ 900
Funded status of plan	100
Future annual benefit payments	$ 300
Equity Securities [Member]
Weighted average asset allocations for the defined benefit plan	67%
Debt Securities [Member]
Weighted average asset allocations for the defined benefit plan	33%
Equity mutual funds [Member]
Cash contribution under plan	$ 600
Fixed income - corporate bonds [Member]
Cash contribution under plan	$ 300