|
Rental expense and rental income for all operating leases (Details) (USD $)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Rental expense and rental income for all operating leases | ||
| Minimum rentals | $ 769,000 | $ 764,000 |
| Sublease rental income | (76,104) | (215,141) |
| Total Rental expense | $ 692,896 | $ 548,859 |