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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Net sales $ 101,376 $ 113,876 $ 205,469 $ 236,895
Cost of sales 72,431 79,906 137,528 168,543
Gross profit 28,945 33,970 67,941 68,352
Operating expenses:        
Selling, general and administrative expenses 12,736 14,001 26,899 26,635
Research and development expenses 13,410 13,322 25,364 26,745
Merger-related costs 0 2,459 0 12,290
Other charges 797 2,561 797 3,146
Total operating expenses 26,943 32,343 53,060 68,816
Operating income (loss) 2,002 1,627 14,881 (464)
Interest expense (499) (85) (610) (1,126)
Foreign currency gain (loss), net (7,012) 250 (7,702) (4,421)
Other income, net 1,272 611 2,205 1,231
Income (loss) before income tax expense (4,237) 2,403 8,774 (4,780)
Income tax expense (benefit) (897) 2,601 2,586 2,891
Net income (loss) $ (3,340) $ (198) $ 6,188 $ (7,671)
Basic earnings (loss) per common share— $ (0.07) $ 0 $ 0.14 $ (0.18)
Diluted earnings (loss) per common share— $ (0.07) $ 0 $ 0.13 $ (0.18)
Weighted average number of shares—        
Basic 44,897,278 46,322,027 45,248,293 43,324,088
Diluted 44,897,278 46,322,027 46,329,559 43,324,088
Standard products business [Member]        
Net sales $ 91,288 $ 103,268 $ 185,298 $ 216,174
Cost of sales 63,620 70,409 119,700 149,656
Gross profit 27,668 32,859 65,598 66,518
Fab Three Foundry Services [Member]        
Net sales 10,088 10,608 20,171 20,721
Cost of sales 8,811 9,497 17,828 18,887
Gross profit $ 1,277 $ 1,111 $ 2,343 $ 1,834