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Quarterly Results of Operations (Unaudited)
 12 Months Ended
Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]  
Quarterly Results of Operations (Unaudited) Quarterly Results of Operations (Unaudited)
The following is a summary of the unaudited quarterly results of operations for the years ended December 31, 2021, 2020 and 2019 (in thousands).
1st Quarter2nd Quarter3rd Quarter4th QuarterTotal Year
2021:
Product sales$69,133 $79,117 $67,643 $68,132 $284,025 
Tooling sales3,696 1,344 13,382 5,036 23,458 
Net sales72,829 80,461 81,025 73,168 307,483 
Gross margin12,718 13,736 6,415 8,475 41,344 
Operating income (loss)5,346 6,173 (2,393)1,942 11,068 
Net income (loss)3,456 4,086 (3,312)441 4,671 
Net income (loss) per common share:
Basic (1)
$0.41 $0.48 $(0.41)$0.05 $0.55 
Diluted (1)
$0.41 $0.48 $(0.41)$0.05 $0.55 
2020:
Product sales$61,930 $35,847 $54,240 $58,563 $210,580 
Tooling sales2,093 1,959 5,633 2,091 11,776 
Net sales64,023 37,806 59,873 60,654 222,356 
Gross margin10,766 2,903 10,838 9,967 34,474 
Operating income (loss)4,261 (1,206)4,321 3,014 10,390 
Net income (loss)7,961 (2,272)3,343 (867)8,165 
Net income (loss) per common share:
Basic (1)
$0.97 $(0.29)$0.39 $(0.10)$0.98 
Diluted (1)
$0.97 $(0.29)$0.39 $(0.10)$0.98 
2019:
Product sales$71,451 $75,440 $67,511 $54,585 $268,987 
Tooling sales815 5,807 7,144 1,537 15,303 
Net sales72,266 81,247 74,655 56,122 284,290 
Gross margin3,149 8,491 6,484 3,382 21,506 
Operating income (loss)(4,017)1,267 (4,657)(4,121)(11,528)
Net income (loss)(3,845)209 (6,125)(5,462)(15,223)
Net income (loss) per common share:
Basic (1)
$(0.49)$0.03 $(0.78)$(0.69)$(1.94)
Diluted (1)
$(0.49)$0.03 $(0.78)$(0.69)$(1.94)
(1) Sum of the quarters may not sum to total year due to rounding.