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Note 15 - Summary of Quarterly Results of Operations (Unaudited) | 12 Months Ended
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Mar. 31, 2021
Notes to Financial Statements |
Quarterly Financial Information [Text Block] | 15. SUMMARY OF QUARTERLY RESULTS OF OPERATIONS (Unaudited) The following is a summary of unaudited quarterly results of operations for the years ended March 31, 2021 and 2020 :
|  | Quarter Ended |
|  | June 30, |  |  | September 30, |  |  | December 31, |  |  | March 31, |
|  | 2020 |  |  | 2020 |  |  | 2020 |  |  | 2021 |
Net sales |  | $ | 23,524,600 |  |  | $ | 24,861,680 |  |  | $ | 28,502,049 |  |  | $ | 49,214,204 |
Gross profit |  |  | 256,754 |  |  |  | 1,091,097 |  |  |  | 4,495,849 |  |  |  | 17,741,498 |
Net earnings (loss) |  |  | (858,862 | ) |  |  | (250,005 | ) |  |  | 2,129,745 |  |  |  | 10,403,597 |
Basic |  |  | (0.12 | ) |  |  | (0.04 | ) |  |  | 0.30 |  |  |  | 1.49 |
Diluted |  |  | (0.12 | ) |  |  | (0.04 | ) |  |  | 0.30 |  |  |  | 1.49 |
|  | Quarter Ended |
|  | June 30, |  |  | September 30, |  |  | December 31, |  |  | March 31, |
|  | 2019 |  |  | 2019 |  |  | 2019 |  |  | 2020 |
Net sales |  | $ | 40,975,320 |  |  | $ | 39,995,580 |  |  | $ | 28,150,817 |  |  | $ | 32,980,607 |
Gross profit (loss) |  |  | 1,471,324 |  |  |  | (782,650 | ) |  |  | 52,933 |  |  |  | 1,868,728 |
Net earnings (loss) |  |  | 194,772 |  |  |  | (1,544,137 | ) |  |  | (881,003 | ) |  |  | (3,018,842 | )
Basic |  |  | 0.03 |  |  |  | (0.22 | ) |  |  | (0.13 | ) |  |  | (0.43 | )
Diluted |  |  | 0.03 |  |  |  | (0.22 | ) |  |  | (0.13 | ) |  |  | (0.43 | )

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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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=124502072&loc=SL124452896-108306 + Details
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