SIGNIFICANT ACCOUNTING POLICIES - Contract Asset Changes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Training and Simulation Division
Contract with Customer Assets and Liabilities [Line Items]
Net income (loss)	$ 659,037	$ 955,022	$ 1,856,664
Power Systems Division
Contract with Customer Assets and Liabilities [Line Items]
Net income (loss)	$ 656,665	$ 40,888	$ (57,384)