Quarterly report pursuant to Section 13 or 15(d)

Commitments and contingencies (Details)

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Commitments and contingencies (Details)
3 Months Ended
Mar. 31, 2017
USD ($)
Officers
Employment Contracts [Member]  
Operating Leased Assets [Line Items]  
Number of officers | Officers 3
Annual commitment amount $ 900,000
Subsidiary [Member]  
Operating Leased Assets [Line Items]  
Rent expense $ 80,000
BDI [Member]  
Operating Leased Assets [Line Items]  
Lease expiration date Mar. 31, 2018
Future minimum operating lease commitments owed in 2017 $ 233,000
Future minimum operating lease commitments owed in 2018 78,000
Monthly base rent owed for office and laboratory space 15,700
Monthly common area maintenance costs required under lease agreement 10,200
Rent expense 87,000
Lease deposit $ 37,000