Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful accounts, accounts receivable current	$ 91,000	$ 341,000
Allowance for doubtful accounts, financial receivables current	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares issued
Common stock, shares authorized	50,000,000	50,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares issued	18,316,000	14,578,000
Common stock, shares outstanding	17,435,000	13,767,000
Treasury stock, shares	881,000	811,000