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4. STOCK-BASED COMPENSATION (Details - Stock based compensation) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Stock based compensation expense $ 6,971 $ 49,532 $ 33,028 $ 110,433
Cost of Goods Sold [Member]        
Stock based compensation expense 0 8,669 8,669 17,338
Research and Development Expense [Member]        
Stock based compensation expense 320 6,692 7,012 16,009
Selling, General and Administrative Expenses [Member]        
Stock based compensation expense $ 6,651 $ 34,171 $ 17,347 $ 77,086