TREASURY STOCK (Details) - USD ($)		3 Months Ended	9 Months Ended
	Apr. 10, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019	Jan. 31, 2019
Treasury Stock
Stock repurchase program authorized amount					$ 10,000,000	$ 10,000,000
Existing buyback program						10,000,000
Shares repurchased (in shares)			532,477
Stock repurchased amount		$ 1,784,560	$ 31,096,662	$ 3,977,005
Average price per share of stock repurchased			$ 58.40
Aggregate shares repurchased under repurchase plan, shares			0
Block Share Repurchase
Treasury Stock
Existing buyback program	10,000,000
Shares repurchased (in shares)	320,741
Percentage of Company’s outstanding shares purchased	6.00%
Stock repurchased amount	$ 18,400,000
Minimum ownership interest held by largest shareholder	28.00%