Summary of Significant Accounting Policies - (Details) - shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accounting Policies [Abstract]
Denominator for basic net income (loss) per share - weighted average shares	11,629,000	12,044,000
Effect of dilutive securities: Stock options, restricted stock and restricted stock units	0	172,000
Denominator for diluted net income (loss) per share - weighted average shares	11,629,000	12,216,000