Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Preferred stock, par value	$ .001	$ .001
Preferred stock, undesignated shares authorized	1,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ .001	$ .001
Common stock, shares authorized	8,200,000	8,200,000
Common stock, shares issued	2,918,393	2,910,334
Common stock, shares outstanding	2,740,909	2,732,850
Treasury stock, shares	177,484	177,484