6. Inventory, net (Details) - USD ($)  | 
Mar. 31, 2020  | 
Dec. 31, 2019  | 
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Parts | $ 53,820 | $ 31,458 | 
| Finished goods | 94,964 | 102,889 | 
| Inventory, gross | 148,784 | 134,347 | 
| Less inventory reserve | (71,603) | (71,414) | 
| Inventory, net | $ 77,181 | $ 62,933 | 
| X | ||||||||||
- References No definition available. 
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Amount by which inventory stated at last-in first-out (LIFO) is less than (in excess of) inventory stated at other inventory cost methods. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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