Annual report pursuant to Section 13 and 15(d)

VALUATION AND QUALIFYING ACCOUNTS (Details)

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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance $ 225,622 $ 376,037 $ 376,037
Charged (credited) to earnings 0 (150,415) 0
Deductions 0 0 0
Ending balance 225,622 225,622 376,037
SEC Schedule, 12-09, Allowance, Credit Loss      
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]      
Beginning balance 300,000 300,000 210,000
Charged (credited) to earnings 152,000 0 183,339
Deductions 0 0 (93,339)
Ending balance $ 452,000 $ 300,000 $ 300,000