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Quarterly Financial Information (unaudited) | 12 Months Ended
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Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Information (unaudited) | (16) Quarterly Financial Information (unaudited) The following is a summary of the quarterly results of operations for the years ended December 31, 2019 and 2018 (in thousands except per share data):
|  | For the three months ended |
2019 |  | December 31 |  |  | September 30 |  |  | June 30 |  |  | March 31 |
Sales |  | $ | 13,028 |  |  | $ | 13,142 |  |  | $ | 14,462 |  |  | $ | 15,107 |
Gross profit |  |  | 5,779 |  |  |  | 6,075 |  |  |  | 6,685 |  |  |  | 6,785 |
Total operating expenses |  |  | 5,868 |  |  |  | 6,280 |  |  |  | 6,189 |  |  |  | 6,607 |
Net income (loss) |  |  | 63 |  |  |  | (135 | ) |  |  | 662 |  |  |  | 336 |
Basic net income (loss) per share |  |  | 0.01 |  |  |  | (0.01 | ) |  |  | 0.07 |  |  |  | 0.03 |
Diluted net income (loss) per share |  |  | 0.01 |  |  |  | (0.01 | ) |  |  | 0.07 |  |  |  | 0.03 |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales |  | $ | 16,562 |  |  | $ | 15,787 |  |  | $ | 14,972 |  |  | $ | 13,305 |
Gross profit |  |  | 6,850 |  |  |  | 6,865 |  |  |  | 6,602 |  |  |  | 6,194 |
Total operating expenses |  |  | 5,730 |  |  |  | 6,558 |  |  |  | 10,251 |  |  |  | 7,358 |
Net income (loss) |  |  | 1,275 |  |  |  | 437 |  |  |  | (3,190 | ) |  |  | (1,106 | )
Basic net loss per share |  |  | 0.13 |  |  |  | 0.05 |  |  |  | (0.34 | ) |  |  | (0.12 | )
Diluted net loss per share |  |  | 0.13 |  |  |  | 0.04 |  |  |  | (0.34 | ) |  |  | (0.12 | )

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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