v3.19.1

Acquisition of Unitron Assets - Additional Information (Detail) |  |  |  |  | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 17, 2018 USD ($) Store | Mar. 12, 2018 shares | Jan. 05, 2018 shares | Aug. 02, 2017 shares | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Business acquisition, net sales |  |  |  |  | $ 5,225,000 | $ 4,092,000 |  |
Business acquisition, operating loss |  |  |  |  | $ 2,762,000 | $ 2,531,000 |  |
Cooltech Holding Corp. ("Cooltech") [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, shares issued | shares |  | 675,656 |  | 100,000 |  |  |  |
Cooltech Holding Corp. ("Cooltech") [Member] | Restricted Stock Award [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Common stock, shares issued | shares |  |  | 625,000 |  |  |  |  |
Unitron Assets [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Advanced funds | $ 3,700,000 |  |  |  |  |  |  |
Assumption of debt under merger consideration | $ 868,000 |  |  |  |  |  |  |
Business acquisition, unaudited pro forma net sales |  |  |  |  |  |  |  | $ 26,503,000
Business acquisition, unaudited pro forma net loss |  |  |  |  |  |  |  | $ 22,383,000
Unitron Assets [Member] | Dominican Republic [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Number of retail electronic stores acquired | Store | 7 |  |  |  |  |  |  |
Business acquisition, net sales |  |  |  |  |  |  | $ 1,607,000 |
Business acquisition, operating loss |  |  |  |  |  |  | $ 204,000 |

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