Post-effective amendment to a registration statement that is not immediately effective upon filing

Commitments and contingencies (Details)

v3.8.0.1
Commitments and contingencies (Details) - Fuller Road Management Corporation ("FRMC") [Member] - Definitive Real Property Purchase Agreement [Member]
Jun. 26, 2017
USD ($)
Year 1 $ 5,960,000
Year 2 3,973,333
Year 3 $ 1,986,667