XML 70 R12.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Cash, Cash Equivalents and Short-term Investments | 12 Months Ended
--- | ---
Dec. 31, 2014
Cash, Cash Equivalents and Short-term Investments |
Cash, Cash Equivalents and Short-term Investments | 5. Cash, Cash Equivalents and Short-term Investments The following tables summarize the Company's cash, cash equivalents and short-term investments as of December 31, 2014 and December 31, 2013 (in thousands):
December 31, 2014 |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
Cash and money market funds |  | $ | 6,414 |  | $ | — |  | $ | — |  | $ | 6,414 |
Corporate debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Due in one year or less |  |  | 53,843 |  |  | 2 |  |  | (28 | ) |  | 53,817 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 60,257 |  | $ | 2 |  | $ | (28 | ) | $ | 60,231 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reported as: |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 6,414 |  | $ | — |  | $ | — |  | $ | 6,414 |
Short-term investments |  |  | 53,843 |  |  | 2 |  |  | (28 | ) |  | 53,817 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 60,257 |  | $ | 2 |  | $ | (28 | ) | $ | 60,231 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2013 |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value |
Cash and money market funds |  | $ | 18,078 |  | $ | — |  | $ | — |  | $ | 18,078 |
Corporate debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |
Due in one year or less |  |  | 22,631 |  |  | 11 |  |  | (2 | ) |  | 22,640 |
Due in two years or less |  |  | 3,708 |  |  | 2 |  |  | (1 | ) |  | 3,709 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 44,417 |  | $ | 13 |  | $ | (3 | ) | $ | 44,427 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reported as: |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | $ | 18,078 |  | $ | — |  | $ | — |  | $ | 18,078 |
Short-term investments |  |  | 26,339 |  |  | 13 |  |  | (3 | ) |  | 26,349 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | 44,417 |  | $ | 13 |  | $ | (3 | ) | $ | 44,427 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
At December 31, 2014 and 2013 we held thirty two and eight debt securities that had been in an unrealized loss position for less than 12 months, respectively. We held no investments that have been in a continuous unrealized loss position for 12 months or longer. The aggregate fair value of these securities was $44.2 million and $9.5 million at December 31, 2014 and 2013 respectively. We evaluated our securities for other-than-temporary impairments based on quantitative and qualitative factors. We considered the decline in market value for the thirty two securities as of December 31, 2014 to be primarily attributable to current economic and market conditions. It is not more likely than not that we will be required to sell these securities. Based on our analysis, we do not consider these investments to be other-than-temporarily impaired as of December 31, 2014 or 2013. As of December 31, 2014, we held $7.5 million in financial institution debt securities and other corporate debt securities located in Canada, the United Kingdom, and France. As of December 31, 2013, we held $11.7 million in financial institution debt securities and other corporate debt securities located in Canada, the United Kingdom, the Netherlands, Australia, and Norway. Based on our analysis, we do not consider these investments to be other-than-temporarily impaired as of December 31, 2014 or 2013. We had no realized gains or losses or other-than-temporary impairments on our short-term investments for the years ended December 31, 2014, 2013, and 2012.

X
- Details
Name: | ovas_CashCashEquivalentsAndMarketableSecuritiesAbstract
Namespace Prefix: | ovas_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References No definition available. + Details
Name: | us-gaap_CashCashEquivalentsAndMarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration