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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Revenues      
Revenue [1] $ 117,687 $ 103,135 $ 96,179
Cost of revenues      
Cost of revenue 52,754 42,219 41,560
Gross profit 64,933 60,916 54,619
Operating expenses:      
Selling 12,910 8,260 8,823
General and administrative 37,826 31,295 26,255
Research and development 6,355 3,506 3,539
Impairment loss on goodwill and long-lived assets 298 4,774 13,819
Legal settlement 50 3,300  
Total operating expenses 57,439 51,135 52,436
Operating income 7,494 9,781 2,183
Nonoperating expense:      
Interest expense and amortization of debt discount 5,504 1,749 1,853
Interest income (960) (29) (5)
Other (income) expense, net (483) (562) 34
Total nonoperating expense 4,061 1,158 1,882
Earnings before income taxes 3,433 8,623 301
Income tax expense 2,084 1,139 3,263
Net income (loss) $ 1,349 $ 7,484 $ (2,962)
Earnings (loss) per share:      
Basic (in dollars per share) $ 0.32 $ 1.95 $ (0.79)
Diluted (in dollars per share) $ 0.31 $ 1.86 $ (0.79)
Weighted-average common shares outstanding:      
Basic (in shares) 4,200 3,839 3,770
Diluted (in shares) 4,371 4,033 3,770
Product [Member]      
Revenues      
Revenue $ 93,401 $ 81,798 $ 74,386
Cost of revenues      
Cost of revenue 40,874 30,250 29,877
Service [Member]      
Revenues      
Revenue 24,286 21,337 21,793
Cost of revenues      
Cost of revenue $ 11,880 $ 11,969 $ 11,683
[1] Intersegment revenues are not significant and are eliminated to arrive at consolidated totals.