Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Sep. 30, 2016	Dec. 31, 2015
Stockholders' equity:
Common stock, par value	$ 0	$ 0
Common stock, authorized shares	25,000,000	25,000,000
Common stock, issued shares	20,783,032	20,775,921
Common stock, outstanding shares	20,783,032	20,775,921