XML 13 R3.htm IDEA: XBRL DOCUMENT v3.20.2
CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
Statement of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized 50,000,000 50,000,000
Common stock, issued 11,736,386 11,718,246
Common stock, outstanding 11,736,386 11,718,246
Accounts receivable, allowance for doubtful accounts $ 275,000 $ 222,025