Summary of significant accounting policies (Details) - Revenue from External Customers by Products or Services - USD ($) |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Revenue from External Customer [Line Items] | ||||||
| Revenues | $ 146,547 | $ 610,317 | $ 512,075 | $ 1,231,100 | $ 1,889,435 | $ 1,315,660 |
| Revenues, Percentage | 100.00% | 100.00% | ||||
| Solar PV Residental and Commercial Sales [Member] | ||||||
| Revenue from External Customer [Line Items] | ||||||
| Revenues | $ 1,827,361 | $ 1,160,296 | ||||
| Revenues, Percentage | 97.00% | 88.00% | ||||
| Solar Thermal Residential - Commercial [Member] | ||||||
| Revenue from External Customer [Line Items] | ||||||
| Revenues | $ 0 | $ 11,112 | ||||
| Revenues, Percentage | 0.00% | 1.00% | ||||
| ABCO LED & Energy Efficient Lighting [Member] | ||||||
| Revenue from External Customer [Line Items] | ||||||
| Revenues | $ 59,964 | $ 143,783 | ||||
| Revenues, Percentage | 3.00% | 11.00% | ||||
| Interest Income [Member] | ||||||
| Revenue from External Customer [Line Items] | ||||||
| Revenues | $ 2,110 | $ 469 | ||||
| Revenues, Percentage | 0.00% | 0.00% | ||||