Business Combinations (Details 1) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Matrix
Fair value of the net tangible assets acquired and liabilities assumed:
Current assets (including accounts receivable of $1,287 and $111 for Matrix and Poseidon, respectively)	$ 1,755
Equipment and improvements and other long-term assets	966
Accounts payable and accrued liabilities	(746)
Deferred revenues	0
Deferred tax liabilities	1,975
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	150
Goodwill	1,966
Total identifiable intangible assets acquired	11,866
Total purchase price	13,841
Matrix | Trade Name [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	8,650
Matrix | Customer Relationships [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	0
Matrix | Software Technology [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	1,100
Poseidon [Member]
Fair value of the net tangible assets acquired and liabilities assumed:
Current assets (including accounts receivable of $1,287 and $111 for Matrix and Poseidon, respectively)	143
Equipment and improvements and other long-term assets	39
Accounts payable and accrued liabilities	0
Deferred revenues	(18)
Deferred tax liabilities	164
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	0
Goodwill	419
Total identifiable intangible assets acquired	2,369
Total purchase price	2,533
Poseidon [Member] | Trade Name [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	800
Poseidon [Member] | Customer Relationships [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	1,150
Poseidon [Member] | Software Technology [Member]
Fair value of identifiable intangible assets acquired:
Intangible assets other than Goodwill	$ 0