2013 | 2012 | ||||||
Cash and cash equivalents: | |||||||
Cash | $ | 45,637 | $ | 35,413 | |||
Available-for-sale | 346,452 | 490,904 | |||||
Held-to-maturity | — | 2,516 | |||||
Total cash and cash equivalents | $ | 392,089 | $ | 528,833 | |||
Short-term investments: | |||||||
Available-for-sale | $ | 4,290,823 | $ | 3,370,551 | |||
Held-to-maturity (less than one year to maturity) | — | 994 | |||||
Total short-term investments | $ | 4,290,823 | $ | 3,371,545 |