|
Amortization expense (Details) (USD $)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Amortization expense: | ||
| Database amortization expense | $ 43,022 | $ 86,040 |
| Accumulated amortization | $ 368,746 | $ 325,724 |