Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts receivable, current	$ 110	$ 107
Accumulated depreciation on property and equipment	20,941	30,140
Accumulated amortization on intangible assets	$ 15,767	$ 14,508
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	1,029,072	1,029,072
Common stock, shares outstanding	912,754	912,754
Treasury stock, shares	116,318	116,318