Accounts payable and accrued liabilities as of June 30, 2016 and 2015, are as follows:
| 2016 | 2015 | |
| Payable to vendors and contractors | $ 3,531,052 | $ 1,915,422 |
| Accrued sick leave liability | 292,360 | 292,360 |
| Accrued salaries and other liabilities | 1,450,796 | 2,137,802 |
| $ 5,274,208 | $ 4,345,584 |
Unearned revenue consists of the following as of June 30, 2016 and 2015:
2016 2015
Unearned summer school tuition and fees $ 175,077 $ 205,411
Unearned grants and contracts $ 875,191 $ 669,138
$ 1,050,268 $ 874,549
Long-term liabilities as of June 30, 2016, are summarized as follows:
| Beginning Balance | Additions | Reductions | Ending Balance | Current Portion | Noncurrent portion | |
|---|---|---|---|---|---|---|
| General receipts bonds | $ 3,195,000 | $ - | $ 215,000 | $ 2,980,000 | $ 225,000 | $ 2,755,000 |
| Note payable - City of Frankfort | 200,000 | - | 50,000 | 150,000 | 50,000 | 100,000 |
| Capital lease - police vehicles | 67,469 | - | 33,735 | 33,734 | 33,734 | - |
| Capital lease obligations-energy savings | 3,232,538 | - | 483,243 | 2,749,295 | 504,198 | 2,245,097 |
| Bond discount | (49,798) | - | - | (49,798) | (3,064) | (46,734) |
| Total bonds payable and capital lease obligations | 6,645,209 | - | 781,978 | 5,863,231 | 809,868 | 5,053,363 |
| Federal grants refundable | 534,914 | - | - | 534,914 | - | 534,914 |
| Total long-term liabilities | $ 7,180,123 | $ - | $ 781,978 | $ 6,398,145 | $ 809,868 | $ 5,588,277 |