7. Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Payroll and incentive compensation	$ 1,560	$ 859
Real estate tax	394	377
Other	215	302
Total accrued expenses	$ 2,169	$ 1,538