| | December 31, | | |||||||
| | 2017 | | 2016 | | 2015 | | |||
Cash and cash equivalents | | $ | 16,112,268 | | | 14,681,204 | | | 14,046,262 | |
Investments in securities at fair value through profit or loss | | | 1,127,841 | | | 970,292 | | | 1,242,614 | |
Investments held to maturity | | | 64,629 | | | 65,509 | | | 52,572 | |
Accounts receivable net of guarantees received | | | 2,143,390 | | | 2,264,941 | | | 1,621,929 | |
Derivative financial instruments | | | - | | | 8,308 | | | 1,244 | |
| | $ | 19,448,128 | | | 17,990,254 | | | 16,964,621 | |