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Note 10 - Components of Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Accrued Liabilities [Table Text Block] |
|  |  | December 31, 2017 |  |  |  | December 31, 2016 |
Accrued payroll, commission and benefits |  | $ | 365,709 |  |  | $ | 267,715 |
Accrued project management costs |  |  | 47,866 |  |  |  | 41,499 |
Value added tax payable |  |  | 25,730 |  |  |  | 24,605 |
Customer advances |  |  | 12,926 |  |  |  | 10,432 |
Accrued contract costs (overbillings) |  |  | 12,891 |  |  |  | 16,713 |
Other |  |  | 50,977 |  |  |  | 38,795 |
|  | $ | 516,099 |  |  | $ | 399,759 |

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