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v3.20.1

Summary of Significant Accounting Policies (Details 3) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues |  |  |
Total revenues | $ 383,458 | $ 559,386 | $ 882,011
Parent [Member] |  |  |
Revenues |  |  |
Sale of medical equipment | 212,394 | 342,344 | 882,011
Provision of OSAS diagnostic services | 171,064 | 217,042 |
Total revenues | 383,458 | 559,386 | 882,011
Cost of revenue |  |  |
Sale of medical equipment | (112,942) | (464,918) | (1,655,970)
Provision of OSAS diagnostic services | (630,802) | (292,983) |
Total cost of revenue | (743,744) | (757,901) | (1,655,970)
Gross loss |  |  |
Sale of medical equipment | 99,452 | (122,574) | (773,959)
Provision of OSAS diagnostic services | (459,738) | (75,941) |
Total gross loss | (360,286) | (198,515) | (773,959)
Depreciation and amortization expense: |  |  |
Sale of medical equipment | 84,371 | 535,800 | 1,328,403
Provision of OSAS diagnostic services | 693,746 | 291,830 |
Total depreciation and amortization expenses | 778,117 | 827,630 | 1,328,403
Capital expenditure |  |  |
Sale of medical equipment |  | 16,137 | 40,780
Provision of OSAS diagnostic services |  | 760,191 |
Total capital expenditure |  | $ 776,328 | $ 40,780

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