Consolidated Income Statements - Unaudited - USD ($)	3 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
REVENUES	$ 152,620,000	$ 129,600,000
Cost of revenues	115,407,000	103,091,000
Gross profit	37,213,000	26,509,000
General and administrative expenses	16,645,000	15,585,000
Income before income tax provision	20,568,000	10,924,000
Income tax provision	3,725,000	2,622,000
NET INCOME	$ 16,843,000	$ 8,302,000
Net income per common and common equivalent share
Basic	$ 0.94	$ 0.46
Diluted	$ 0.92	$ 0.46
Weighted average common and common equivalent shares
Basic	17,897,000	17,983,000
Diluted	18,220,000	18,114,000