XML 16 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6

Marketable Securities: (Tables)

6 Months Ended

Jun. 30, 2012

Marketable Securities:

Reconciliation of marketable securities

		June 30, 2012			December 31, 2011
Government debt securities, at par value		$	24,458		$	25,147
Less discount			(201	)		(314	)
			24,257			24,833
Unrealized gain			1,228			1,803
Fair value (Level 1 measurement)		$	25,485		$	26,636

Future contractual maturities of marketable securities

1 year or less		$	1,378
2 to 5 years			23,080
		$	24,458

X

- Definition

A table of investments, shown as a text block.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

+ Details

Name:	invest_InvestmentTableTextBlock
Namespace Prefix:	invest_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

No definition available.

+ Details

Name:	us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration