Quarterly report pursuant to Section 13 or 15(d)

Notes and other obligations (Schedule of Long-Term Debt) (Details)

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Notes and other obligations (Schedule of Long-Term Debt) (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Debt Disclosure [Abstract]    
Mortgage notes
Other short-term installment obligations 56,158 139,611
Notes and other obligations 56,158 139,611
Less current portion 56,158 139,611
Notes and other obligations, noncurrent