SEGMENT REPORTING, Reportable Segment Information (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2022 USD ($) Segment	Jun. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)
SEGMENT REPORTING [Abstract]
Number of business segments | Segment	2
Reportable Segment Information [Abstract]
Net sales	$ 458,359	$ 416,649
Cost of Sales [Abstract]
Cost of sales	344,836	311,137
Gross profit	113,523	105,512
Selling, general, and administrative	76,767	68,775
Depreciation and amortization	3,210	3,926
Interest and financing costs	363	359
Operating expenses	80,340	73,060
Operating income	33,183	32,452
Other income (expense)	(2,153)	123
Earnings before tax	31,030	32,575
Net Sales [Abstract]
Contracts with customers	444,747	401,959
Financing and other	13,612	14,690
Net sales	458,359	416,649
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	4,472	6,082
Purchases of property, equipment and operating lease equipment	1,777	6,994
Selected Financial Data - Balance Sheet [Abstract]
Total assets	1,256,150	1,077,416	$ 1,166,203
Product [Member]
Reportable Segment Information [Abstract]
Net sales	395,250	361,057
Cost of Sales [Abstract]
Cost of sales	304,210	277,227
Net Sales [Abstract]
Net sales	395,250	361,057
Service [Member]
Reportable Segment Information [Abstract]
Net sales	63,109	55,592
Cost of Sales [Abstract]
Cost of sales	40,626	33,910
Net Sales [Abstract]
Net sales	63,109	55,592
Technology Segment [Member]
Reportable Segment Information [Abstract]
Net sales	448,785	400,358
Net Sales [Abstract]
Contracts with customers	443,802	396,541
Financing and other	4,983	3,817
Net sales	448,785	400,358
Operating Segments [Member] | Technology Segment [Member]
Reportable Segment Information [Abstract]
Net sales	448,785	400,358
Cost of Sales [Abstract]
Cost of sales	343,134	304,925
Gross profit	105,651	95,433
Selling, general, and administrative	73,112	66,153
Depreciation and amortization	3,182	3,898
Interest and financing costs	138	159
Operating expenses	76,432	70,210
Operating income	29,219	25,223
Net Sales [Abstract]
Contracts with customers	443,802	396,541
Financing and other	4,983	3,817
Net sales	448,785	400,358
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	3,515	4,103
Purchases of property, equipment and operating lease equipment	1,286	1,307
Selected Financial Data - Balance Sheet [Abstract]
Total assets	1,007,898	868,276
Operating Segments [Member] | Technology Segment [Member] | Product [Member]
Reportable Segment Information [Abstract]
Net sales	385,676	344,766
Cost of Sales [Abstract]
Cost of sales	302,508	271,015
Net Sales [Abstract]
Net sales	385,676	344,766
Operating Segments [Member] | Technology Segment [Member] | Service [Member]
Reportable Segment Information [Abstract]
Net sales	63,109	55,592
Cost of Sales [Abstract]
Cost of sales	40,626	33,910
Net Sales [Abstract]
Net sales	63,109	55,592
Operating Segments [Member] | Financing Segment [Member]
Reportable Segment Information [Abstract]
Net sales	9,574	16,291
Cost of Sales [Abstract]
Cost of sales	1,702	6,212
Gross profit	7,872	10,079
Selling, general, and administrative	3,655	2,622
Depreciation and amortization	28	28
Interest and financing costs	225	200
Operating expenses	3,908	2,850
Operating income	3,964	7,229
Net Sales [Abstract]
Contracts with customers	945	5,418
Financing and other	8,629	10,873
Net sales	9,574	16,291
Selected Financial Data - Statement of Cash Flow [Abstract]
Depreciation and amortization	957	1,979
Purchases of property, equipment and operating lease equipment	491	5,687
Selected Financial Data - Balance Sheet [Abstract]
Total assets	248,252	209,140
Operating Segments [Member] | Financing Segment [Member] | Product [Member]
Reportable Segment Information [Abstract]
Net sales	9,574	16,291
Cost of Sales [Abstract]
Cost of sales	1,702	6,212
Net Sales [Abstract]
Net sales	9,574	16,291
Operating Segments [Member] | Financing Segment [Member] | Service [Member]
Reportable Segment Information [Abstract]
Net sales	0	0
Cost of Sales [Abstract]
Cost of sales	0	0
Net Sales [Abstract]
Net sales	$ 0	$ 0