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6. REVENUE RECOGNITION (Details - Contract liabilities) - USD ($)
3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Revenue from Contract with Customer [Abstract]        
Contract Liabilities, Beginning Balance $ 151,877 $ 388,506 $ 417,059 $ 450,192
Unearned Revenue Received From Customers 442,681 41,874 614,384 334,893
Revenue Recognized (361,674) (119,855) (798,559) (474,560)
Contract Liabilities, Ending Balance $ 232,884 $ 310,525 $ 232,884 $ 310,525