Quarterly report pursuant to Section 13 or 15(d)

C. REVENUE (Details - Contract assets and liabilities)

v3.19.1
C. REVENUE (Details - Contract assets and liabilities) - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Revenue from Contract with Customer [Abstract]      
Contract assets $ 446,662   $ 314,749
Contract liabilities 1,063,276   1,232,623
Net contract liabilities 616,614   $ 917,874
Increase in contract assets 131,913 $ 295,479  
Decrease in contract liabilities (169,347) $ 255,170  
Total variance in contract assets and liabilties $ (301,260)