Receivables (Tables)
 12 Months Ended
Dec. 31, 2014
Receivables [Abstract]  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Accounts and royalties receivable, net consisted of the following:
 
 
 
December 31,
 
December 31,
 
 
 
2014
 
2013
 
Trade receivables
 
$
609,179
 
$
2,449,199
 
Other receivables
 
 
1,312,617
 
 
1,493,979
 
 
 
 
1,921,796
 
 
3,943,178
 
 
 
 
 
 
 
 
 
Less allowance for doubtful accounts
 
 
(32,469)
 
 
(16,497)
 
 
 
$
1,889,327
 
$
3,926,681
 
Schedule Of Change In Allowance For Doubtful Accounts [Table Text Block]
The following table reflects the approximate change in allowance for doubtful accounts.
 
 
 
Balance at
 
Charged to
 
 
 
Balance at
 
 
 
Beginning of
 
Costs and
 
Balances
 
End of
 
 
 
Period
 
Expenses
 
charged-off
 
Period
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2014
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts
 
$
16,497
 
$
31,773
 
$
(15,801)
 
$
32,469
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
 
 
Allowance for doubtful accounts
 
$
42,709
 
$
75,166
 
$
(101,378)
 
$
16,497