Natus Medical (NTUS) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'BABY	'
Entity Registrant Name	'NATUS MEDICAL INC	'
Entity Central Index Key	'0000878526	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	30,963,777

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$44,192	$23,057
Accounts receivable, net of allowance for doubtful accounts of $3,863 in 2013 and $2,617 in 2012	84,803	89,960
Inventories	39,376	40,756
Prepaid expenses and other current assets	5,835	6,379
Deferred income tax	8,400	8,719
Total current assets	182,607	168,871
Property and equipment, net	24,425	26,512
Intangible assets	102,377	96,594
Goodwill	97,323	92,048
Other assets	9,037	7,828
Total assets	415,768	391,853
Current liabilities:	'	'
Accounts payable	26,497	32,537
Short-term borrowings	'	11,300
Current portion of long-term debt	10,563	8,526
Accrued liabilities	25,922	32,938
Deferred revenue	12,449	13,305
Total current liabilities	75,431	98,606
Long-term liabilities:	'	'
Long-term debt, net of current portion	37,500	13,034
Other liabilities	3,759	3,038
Deferred income tax	10,366	8,423
Total liabilities	127,056	123,101
Stockholders' equity:	'	'
Common Stock, $0.001 par value, 120,000,000 shares authorized; shares issued and outstanding 30,880,758 in 2013 and 30,106,933 in 2012	284,288	275,395
Retained earnings	25,387	11,638
Accumulated other comprehensive loss	-20,963	-18,281
Total stockholders' equity	288,712	268,752
Total liabilities and stockholders' equity	$415,768	$391,853

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement Of Financial Position [Abstract]	'	'
Allowance for doubtful accounts	$3,863	$2,617
Common Stock, par value	$0.00	$0.00
Common Stock, shares authorized	120,000,000	120,000,000
Common Stock, shares issued	30,880,758	30,106,933
Common Stock, shares outstanding	30,880,758	30,106,933

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Revenue	$85,392	$81,019	$253,475	$201,459
Cost of revenue	34,058	36,456	104,518	89,237
Gross profit	51,334	44,563	148,957	112,222
Operating expenses:	'	'	'	'
Marketing and selling	20,337	21,805	64,305	54,693
Research and development	7,536	8,513	24,337	21,844
General and administrative	14,323	18,811	40,160	39,206
Total operating expenses	42,196	49,129	128,802	115,743
Income (loss) from operations	9,138	-4,566	20,155	-3,521
Other income (expense), net	-580	-218	-1,437	259
Income (loss) before provision for income tax	8,558	-4,784	18,718	-3,262
Provision for income tax (benefit) expense	2,271	-3,037	4,969	-2,128
Net income (loss)	6,287	-1,747	13,749	-1,134
Foreign currency translation adjustment	646	147	-2,683	-1,813
Comprehensive income (loss)	$6,933	($1,600)	$11,066	($2,947)
Earnings (loss) per share:	'	'	'	'
Basic	$0.21	($0.06)	$0.46	($0.04)
Diluted	$0.20	($0.06)	$0.45	($0.04)
Weighted average shares used in the calculation of earnings (loss) per share:	'	'	'	'
Basic	30,096	29,062	29,825	28,947
Diluted	30,790	29,062	30,576	28,947

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating activities:	'	'
Net income (loss)	$13,749	($1,134)
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	9,554	9,356
Provision for losses on accounts receivable	446	195
Warranty reserve	818	540
Loss on disposal of property and equipment	141	80
Share-based compensation	4,608	5,007
Excess tax benefit on the exercise of stock options	-637	-125
Changes in operating assets and liabilities:	'	'
Accounts receivable	7,105	-12,827
Inventories	-1,428	5,154
Prepaid expenses and other assets	-281	-4,219
Accounts payable	-5,880	9,201
Deferred income tax	-1,176	-7
Accrued liabilities and deferred revenue	-6,365	5,803
Liabilities acquired in acquisitions	61	0
Net cash provided by operating activities	20,715	17,038
Investing activities:	'	'
Acquisition of businesses, net of cash acquired	-18,600	-57,632
Purchases of property and equipment	-597	-3,799
Purchase of intangible assets	-1,815	'
Net cash used in investing activities	-21,012	-61,431
Financing activities:	'	'
Proceeds from stock option exercises and ESPP purchases	5,097	970
Excess tax benefit on the exercise of stock options	637	125
Proceeds from short-term borrowings	'	7,300
Proceeds from long-term borrowings	57,383	25,000
Payments on borrowings	-42,182	-2,230
Net cash provided by financing activities	20,935	31,165
Exchange rate changes effect on cash and cash equivalents	497	-88
Net increase (decrease) in cash and cash equivalents	21,135	-13,316
Cash and cash equivalents, beginning of period	23,057	32,816
Cash and cash equivalents, end of period	44,192	19,500
Supplemental disclosure of cash flow information:	'	'
Cash paid for interest	1,084	215
Cash paid for income taxes	9,861	5,007
Non-cash investing activities:	'	'
Property and equipment included in accounts payable	79	1,919
Inventory transferred to property and equipment	$885	$278

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1 - Basis of Presentation
	The accompanying interim condensed consolidated financial statements of Natus Medical Incorporated (“Natus,” “we,” “us,” “our,” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Except as noted below, the accounting policies followed in the preparation of the interim condensed consolidated financial statements are consistent in all material respects with those presented in Note 1 to the consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.
	Interim financial reports are prepared in accordance with the rules and regulations of the Securities and Exchange Commission; accordingly, they do not include all of the information and notes required by GAAP for annual financial statements. The interim financial information is unaudited, but reflects all normal adjustments that are, in the opinion of management, necessary for the fair presentation of our financial position, results of operations, and cash flows for the interim periods presented. The condensed consolidated balance sheet as of December 31, 2012 was derived from audited financial statements, but does not include all disclosures required by GAAP. The accompanying financial statements should be read in conjunction with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.
	Operating results for the nine months ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013. The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.
	Recent Accounting Pronouncements
	Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income - In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. (“ASU”) 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This topic requires us to provide information about the amounts reclassified out of accumulated other comprehensive income by component and the line items of net income to which significant amounts are reclassified. This topic is for annual and interim periods beginning after December 15, 2012. The update did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Business_Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Business Combinations	'
	2 - Business Combinations
	Grass Technologies
	On February 2, 2013, we completed an asset purchase of the Grass Technologies Product Group (“Grass”) from Astro-Med Inc. for a cash consideration of $18.6 million pursuant to purchase agreement. Grass manufactures and sells clinically differentiated neurodiagnostic and monitoring products, including a portfolio of electroencephalography (EEG) and polysomnography (PSG) systems for both clinical and research use and related accessories and proprietary electrodes. The acquisition strengthened the Company’s existing neurology portfolio and provided new product categories. A total of $624,000 of direct costs associated with the acquisition was expensed as incurred and reported as a component of general and administrative expenses.
	The Company has accounted for the acquisition as a business combination. Under the acquisition method of accounting, the assets acquired and liabilities assumed from Grass are recorded in the consolidated financial statements at their respective fair values as of the acquisition date. The excess of the purchase price over the fair value of the acquired net assets has been recorded as goodwill. Grass’s results of operations are included in our consolidated financial statements since February 2, 2013, the date of the acquisition.
	Valuing certain components of the acquisition, primarily accounts receivable required us to make significant estimates that may be adjusted in the future; consequently, the purchase price allocation is considered preliminary. Final determination of these estimates could result in an adjustment to the preliminary purchase price allocation, with an offsetting adjustment to goodwill. As of September 30, 2013, there have been no adjustments to the preliminary purchase price.
	Approximately $5.2 million has been allocated to goodwill. Goodwill is calculated as the difference between the acquisition date fair value of the consideration transferred and the provisional values assigned to the assets acquired and liabilities assumed and represent primarily the expected synergies of combining the operations of the Company and the Grass business. None of the goodwill is expected to be deductible for tax purposes. In accordance with ASC 350-20, goodwill will not be amortized but instead will be tested for impairment at least annually (more frequently if certain indicators are present). As of September 30, 2013, we have not yet tested the Grass goodwill for impairment. In the event that management determines that the value of goodwill has become impaired, we will incur an accounting charge for the amount of impairment during the fiscal quarter in which the determination is made.
	Grass’s revenue of $3.8 million and $9.7 million and income from operations of $1.1 and $2.1 million are included in our condensed consolidated statements of operations and comprehensive income (loss) for the period from July 1, 2013 to September 30, 2013 and February 2, 2013 (acquisition date) to September 30, 2013, respectively.
	Nicolet
	We acquired the Nicolet neurodiagnostic business (“Nicolet”) from CareFusion on July 2, 2012 pursuant to a Share and Acquisition Purchase Agreement. The Nicolet business develops clinically differentiated neurodiagnostic and monitoring products, including a portfolio of electroencephalography (EEG) and electromyography (EMG) systems and related accessories, as well as vascular and obstetric Doppler sensors and connectivity products. The acquisition strengthened the Company’s existing neurology portfolio and provided new product categories. The acquisition also better positions the Company in international markets, as over 50 percent of the Nicolet business is in markets outside of the United States.
	We acquired all of the outstanding common shares of CareFusion subsidiaries comprising the Nicolet business in the United States, Ireland, and the United Kingdom, and certain assets and liabilities of Nicolet sales divisions principally in China, Brazil, Germany, Italy, the Netherlands, and Spain for $55.5 million. A total of $3.3 million of direct costs associated with the acquisition were expensed as incurred and reported as a component of general and administrative expenses.
	The Nicolet acquisition has been accounted for as a business combination. Under the acquisition method of accounting, the assets acquired and liabilities assumed from Nicolet are recorded in the consolidated financial statements at their respective fair values as of the acquisition date. The excess of the purchase price over the fair value of the acquired net assets has been recorded as goodwill. Nicolet’s results of operations are included in the consolidated financial statements since July 2, 2012, the date of the acquisition.
	During the nine months ending September 30, 2013, we recorded adjustments to the preliminary purchase price allocation for deferred taxes that resulted in a net increase to goodwill of $256,000.
	Pro forma financial information
	The following unaudited pro forma information combining results of operations of the Company for the nine months ended September 30, 2013 and 2012 are presented as if the acquisitions of Grass and Nicolet had occurred on January 1, 2012:
	Unaudited Pro forma Financial Information
	(in thousands)
			Nine Months Ended
			September 30,
			2013		2012
	Revenue		$	254,480	$	264,781
	Income (loss) from operations		$	21,603	$	(1,298	)
	The unaudited pro forma financial information is provided for comparative purposes only and is not necessarily indicative of what actual results would have been had the acquisitions occurred on the dates indicated, nor does it give effect to synergies, cost savings, and other changes expected to result from the acquisitions. Accordingly, the pro forma financial results do not purport to be indicative of results of operations as of the date hereof, for any period ended on the date hereof, or for any other future date or period.
	For purposes of preparing the unaudited pro forma financial information for the period January 1, 2013 through September 30, 2013, Grass’s statement of operations for the period from January 1, 2013 to February 1, 2013 was combined with our consolidated statement of operations and comprehensive income (loss) for the nine months ended September 30, 2013.
	For purposes of preparing the unaudited pro forma financial information for the period January 1, 2012 through June 30, 2012, Grass’s statement of operations and Nicolet’s consolidated statement of revenue and direct expenses for the nine months ended September 30, 2012 were combined with our consolidated statement of operations and comprehensive income (loss) for the nine months ended September 30, 2012.
	The unaudited pro forma consolidated results for the nine month period ended September 30, 2013 reflect the historical information of Natus and Grass, adjusted for the following pre-tax amounts:
		•		Additional amortization expense of $59,300 related to the fair value of identifiable intangible assets acquired;
		•		Decrease of depreciation expense of $14,800 related to the fair value adjustment to property and equipment acquired;
		•		Decrease in general and administrative expense of $624,000 related to the direct acquisition costs that were recorded in the unaudited pro forma financial information in the nine months ended September 30, 2012.
	The unaudited pro forma consolidated results for the nine month period ended September 30, 2012 reflect the historical information of Natus, Grass and Nicolet, adjusted for the following pre-tax amounts:
		•		Elimination of Nicolet’s historical intangible asset amortization expense of approximately $423,000;
		•		Additional amortization expense related to Grass of $535,000 and Nicolet of $564,636 related to the fair value of identifiable intangible assets acquired;
		•		Decrease of Grass’s depreciation expense of approximately $134,000 and Nicolet’s depreciation expense of approximately $782,000 related to the fair value adjustment to property and equipment acquired;
		•		Increase in general and administrative expense relating to Grass’s direct acquisition costs of approximately $624,000 and Nicolet’s direct acquisition costs of $3.3 million;
		•		Increase in cost of goods sold relating to Nicolet’s fair value inventory adjustments of $571,000.

Basic_and_Diluted_Earnings_Per

Basic and Diluted Earnings Per Common Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Basic and Diluted Earnings Per Common Share	'
	3 - Basic and Diluted Earnings Per Common Share
	Basic earnings per share is based upon the weighted average number of common shares outstanding during the period. Diluted earnings per share is based upon the weighted average number of common shares outstanding and dilutive common stock equivalents outstanding during the period. Common stock equivalents are options granted and shares of restricted stock issued under our stock awards plans and are calculated under the treasury stock method. Common equivalent shares from unexercised stock options and unvested restricted stock are excluded from the computation when there is a loss as their effect is anti-dilutive or if the exercise price of such unexercised options is greater than the average market price of the stock for the period.
	For the three and nine months ended September 30, 2013, common stock equivalents of 694,582 and 752,544 shares, respectively, were included in the weighted average shares outstanding used to calculate diluted earnings per share, while common stock equivalents of 1,657,210 and 1,660,852 shares, respectively, were excluded from the calculation of diluted earnings per share because the exercise price of the underlying options was greater than the average market price of the stock for the period.
	For the three and nine months ended September 30, 2012, no common stock equivalent shares were included in the weighted average shares outstanding used to calculate diluted earnings per share because there was a loss in the periods.

Inventories

Inventories	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Inventories	'
	4 - Inventories
	Inventories consist of the following (in thousands):
		September 30,			December 31,
		2013			2012
	Raw materials and subassemblies	$	21,814		$	21,373
	Work in process		3,007			3,085
	Finished goods		19,409			19,795
	Total inventories		44,230			44,253
	Less: Non-current inventories		(4,854	)		(3,497	)
	Inventories, current	$	39,376		$	40,756
	At September 30, 2013 and December 31, 2012, the Company has classified $4.9 million and $3.5 million respectively, of inventories, as non-current. This inventory consists primarily of service components used to repair products pursuant to warranty obligations and extended service contracts, including service components for products we are not currently selling. Management believes that these inventories will be utilized for their intended purpose.

Intangible_Assets

Intangible Assets	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	5 - Intangible Assets
	The following table summarizes the components of gross and net intangible asset balances (in thousands):
		September 30, 2013												December 31, 2012
		Gross			Accumulated			Accumulated			Net Book			Gross			Accumulated			Accumulated			Net Book
		Carrying			Impairment			Amortization			Value			Carrying			Impairment			Amortization			Value
		Amount												Amount
	Intangible assets with definite lives:
	Technology	$	66,380			—		$	(24,161	)	$	42,219		$	63,880			—		$	(20,901	)	$	42,979
	Customer related		32,148			—			(9,563	)		22,585			26,948			—			(7,563	)		19,385
	Internally developed software		11,068			—			(4,816	)		6,252			9,790			—			(4,045	)		5,745
	Patents		2,812			—			(2,016	)		796			2,812			—			(1,925	)		887
	Backlog		724			—			(724	)		—			724			—			(724	)		—
	Definite-lived intangible assets		113,132						(41,280	)		71,852			104,154						(35,158	)		68,996
	Intangible assets with indefinite lives:
	Tradenames		33,770			(1,560	)		—			32,210			30,778			(1,560	)		—			29,218
	Total Intangibles before translation		146,902			(1,560	)		(41,280	)		104,062			134,932			(1,560	)		(35,158	)		98,214
	Translation		(1,964	)		—			278			(1,687	)		(1,864	)		—			244			(1,620	)
	Total intangibles assets	$	144,938		$	(1,560	)	$	(41,002	)	$	102,377		$	133,068		$	(1,560	)	$	(34,914	)	$	96,594
	Definite-lived intangible assets are amortized over their weighted average lives of 15 years for technology, 12 years for customer related intangibles, 7 years for internally developed software, and 14 years for patents. Intangible assets with indefinite lives are not subject to amortization.
	Internally developed software consists of $10.1 million relating to costs incurred for development of internal use computer software and $943,000 for development of software to be sold.
	Amortization expense related to intangible assets with definite lives was as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Technology	$	1,095		$	1,034		$	3,260		$	2,575
	Customer Related		678			595			2,000			1,491
	Internally developed software		262			68			771			1,269
	Patents		30			60			91			161
	Backlog		—			712			—			712
	Total amortization	$	2,065		$	2,469		$	6,122		$	6,208
	Expected amortization expense related to amortizable intangible assets is as follows (in thousands):
	Three months ending December 31, 2013	$	2,032
	2014		7,922
	2015		7,581
	2016		6,747
	2017		6,364
	2018		6,193
	Thereafter		35,013
	Total expected amortization expense	$	71,852

Goodwill

Goodwill	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	6 - Goodwill
	The carrying amount of goodwill and the changes in those balances are as follows (in thousands):
	Gross Balance, December 31, 2012	$	112,048
	Accumulated impairment losses		(20,000	)
	Balance net of impairment losses, December 31, 2012		92,048
	Goodwill as a result of acquisitions		5,607
	Foreign currency translation		(332	)
	Balance, September 30, 2013	$	97,323

Property_and_Equipment_net

Property and Equipment, net	9 Months Ended
	Sep. 30, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment, net	'
	7 - Property and Equipment, net
	Property and equipment, net consist of the following (in thousands):
		September 30,			December 31,
		2013			2012
	Land	$	4,232		$	4,371
	Buildings		10,737			11,422
	Leasehold improvements		3,376			3,450
	Office furniture and equipment		12,182			11,601
	Computer software and hardware		10,881			10,114
	Demonstration and loaned equipment		11,372			11,505
			52,780			52,463
	Accumulated depreciation and amortization		(28,355	)		(25,951	)
	Total	$	24,425		$	26,512
	Depreciation and amortization expense of property and equipment was approximately $1.2 and $3.5 million for the three and nine months ended September 30, 2013, respectively, and was approximately $1.0 and $3.2 million for the three and nine months ended September 30, 2012, respectively.

Reserve_for_Product_Warranties

Reserve for Product Warranties	9 Months Ended
	Sep. 30, 2013
Guarantees [Abstract]	'
Reserve for Product Warranties	'
	8 - Reserve for Product Warranties
	We provide a warranty on all medical device products that is generally one year in length. We also sell extended service agreements on our medical device products that are generally over one year in lenght. Service for domestic customers is provided by Company-owned service centers that perform all service, repair, and calibration services. Service for international customers is provided by a combination of Company-owned facilities and third-party vendors on a contract basis.
	We have accrued a warranty reserve, included in accrued liabilities on the accompanying balance sheets, for the expected future costs of servicing products during the initial warranty period. We base the liability on actual warranty costs incurred to service those products. On new products, additions to the reserve are based on a combination of factors including the percentage of service department labor applied to warranty repairs, as well as actual service department costs, and other judgments, such as the degree to which the product incorporates new technology. The reserve is reduced as costs are incurred to honor existing warranty obligations.
	The details of activity in the warranty reserve are as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Balance, beginning of period	$	2,070		$	2,225		$	2,260		$	2,157
	Acquisition warranty assumed		—			630			191			630
	Warranty accrued for the period		47			129			818			540
	Repairs for the period		(83	)		(500	)		(1,235	)		(843	)
	Balance, end of period	$	2,034		$	2,484		$	2,034		$	2,484
	The estimates we use in projecting future product warranty costs may prove to be incorrect. Any future determination that our product warranty reserves are understated could result in increases to our cost of sales and reductions in our operating profits and results of operations.

ShareBased_Compensation

Share-Based Compensation	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Share-Based Compensation	'
	9 - Share-Based Compensation
	At September 30, 2013, we have two active plans that give rise to share-based compensation, the 2011 Stock Awards Plan and the 2011 Employee Stock Purchase Plan. The terms of awards granted during the nine months ended September 30, 2013 and our methods for determining grant-date fair value of the awards were consistent with those described in the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2012.
	Detail of share-based compensation expense is as follows (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013		2012
	Cost of revenue	$	14		$	49	$	109	$	161
	Marketing and sales		202			400		675		927
	Research and development		175			167		416		380
	General and administrative		1,037			1,855		3,408		3,539
	Total	$	1,428		$	2,471	$	4,608	$	5,007
	As of September 30, 2013, unrecognized compensation expense related to the unvested portion of our stock options and other stock awards was approximately $14.8 million, which is expected to be recognized over a weighted average period of 2.9 years.
	Stock Options
	Activity in our stock options during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted		Weighted-		Aggregate
					Average		average		intrinsic
					Exercise		remaining		value
					Price		contractual		($ 000’s)
							life (years)
	Outstanding, beginning of period		3,882,239		$	11.71
	Granted		626,420		$	14.08
	Exercised		(562,688	)	$	8.09
	Cancelled		(642,243	)	$	15.52
	Outstanding, end of period		3,303,728		$	12.03		4	$	10,059
	Exercisable, end of period		2,198,970		$	11.38		2.2	$	8,647
	Vested and expected to vest, end of period		3,138,903		$	11.97		3.8	$	9,859
	The intrinsic value of options exercised during the nine months ended September 30, 2013 was $3.4 million.
	Restricted Stock Awards
	Activity in our restricted stock awards (“RSAs”) during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted-		Remaining cost
					average		expected to be
					grant date		recognized
					fair value		($ 000’s)
	Unvested, beginning of period		690,890		$	13.02
	Granted		311,180		$	14.06
	Vested		(226,395	)	$	13.92
	Forfeited		(150,020	)	$	12.87
	Unvested, end of period		625,655		$	13.27	$	9.2
	We award restricted stock awards to U.S. employees of the Company that vest 50% upon the second anniversary of the vesting start date and 25% upon each of the third and fourth anniversaries of the vesting start date. We also award RSA’s to non-employee directors of the Company that vest on the first anniversary of the grant date.
	At September 30, 2013 the fair market value of outstanding RSAs was $8.9 million and the weighted average remaining recognition period of unvested RSAs was 2.9 years. At December 31, 2012 the fair market value of outstanding RSAs was $7.7 million and the weighted average remaining recognition period was 2.6 years. The intrinsic value of RSAs equals their fair market value.
	Restricted Stock Units
	Activity in our restricted stock units (“RSUs”) during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted-		Aggregate
					average		intrinsic value
					remaining
					contractual
					life (years)
	Outstanding, beginning of period		50,050
	Awarded		30,890
	Released		(9,974	)
	Forfeited		(15,875	)
	Outstanding, end of period		55,091			1.8	$	781,000
	We award restricted stock units to non-U.S. employees of the Company that vest 50% upon the second anniversary of the vesting start date and 25% upon each of the third and fourth anniversaries of the vesting start date.
	At September 30, 2013 the aggregate intrinsic value of outstanding RSUs was $781,000 and the weighted average remaining recognition period for unvested RSUs was 2.9 years. At December 31, 2012 the aggregate intrinsic value of outstanding RSUs was $559,000 and the weighted average remaining recognition period for unvested RSUs was 2.8 years.

Other_Income_Expense_Net

Other Income (Expense), Net	9 Months Ended
	Sep. 30, 2013
Other Income And Expenses [Abstract]	'
Other Income (Expense), Net	'
	10 - Other income (expense), net
	Other income (expense), net consisted of (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Investment income	$	4		$	11		$	68		$	20
	Interest expense		(138	)		(215	)		(1,084	)		(231	)
	Foreign currency exchange gain (loss)		(165	)		136			(215	)		470
	Other		(281	)		(150	)		(206	)		—
	Total other income (expense), net	$	(580	)	$	(218	)	$	(1,437	)	$	259

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	11 - Income Taxes
	Provision for Income Tax Expense
	We recorded provisions for income tax of $2.3 and $5 million for the three and nine months ended September 30, 2013, respectively. Our effective tax rate was 26.5% for both the three and nine month periods ended September 30, 2013, respectively.
	We recorded provisions for income tax (benefit) of $(3.0) million and $(2.1) million for the three and nine months ended September 30, 2012, respectively. Our effective tax rate was 63.5% and 65.2% for the three and nine months ended September 30, 2012, respectively.
	Our effective tax rate for the nine months ended September 30, 2013 differed from statutory tax rates primarily because of profits taxed in foreign jurisdictions with lower tax rates than the statutory rate and tax benefits related to the 2012 federal research and development tax credit by enactment of the American Taxpayer Relief Act of 2012, in January 2013 domestic manufacturer deduction, and the reduction of the Denmark corporate income tax rate beginning in 2014. The federal research and development credit, domestic manufacturer deduction, and Denmark rate reduction collectively benefited the effective tax rate for the nine month period ended September 30, 2013 by approximately 6%.
	Our effective tax rate for the nine months ended September 30, 2012 differed from statutory tax rates primarily due to the settlement of foreign and U.S. state income tax audits and from the expiration of the statute of limitations on uncertain tax positions that were recorded as a component of income tax expense in prior years.
	There was an insignificant increase of unrecognized tax benefits for the nine months ended September 30, 2013. Within the next twelve months it is possible our uncertain tax benefit may change within a range of approximately zero to $600,000. This change may impact the future effective tax rate and is a result of a lapse of statute of limitations, provided that no taxing authority conducts an examination.
	Our tax returns remain open to examination as follows: U.S. Federal, 2010 through 2012, U.S. States 2008 through 2012 and significant foreign jurisdictions, 2009 through 2012.

Restructuring_Reserves

Restructuring Reserves	9 Months Ended
	Sep. 30, 2013
Restructuring And Related Activities [Abstract]	'
Restructuring Reserves	'
	12 - Restructuring Reserves
	In each of the first and second quarters of 2011, we adopted reorganization plans to improve efficiencies in our operations and integrate the acquisitions of Medix in 2010 and Embla 2011. These restructuring activities were completed as of March 31, 2013.
	In July 2012, we initiated an integration and reorganization plan related to the acquisition of Nicolet to improve efficiencies in our operations resulting in costs incurred associated with employee severance. Substantially all of the staff reductions were completed by March 31, 2013.
	In January 2013, we adopted reorganization plans that are designed to continue to improve efficiencies in our operating units in Europe and South America. These plans were further expanded during the third quarter of 2013 to improve our North America operations.
	The balance of the restructuring reserve is included in accrued liabilities on the accompanying balance sheets. Employee termination benefits expensed are included as a part of general and administrative expenses.
	Activity in the restructuring reserves for these plans for the nine months ended September 30, 2013 is as follows (in thousands):
		2011			July			2013			Totals
		Plans			2012 Plan			Plans
	Balances at December 31, 2012	$	83		$	2,662		$	—		$	2,745
	Expense – Severance		4			211			2,198			2,413
	Expense – Lease Termination		—			—			571			571
	Cash payments		(71	)		(1,350	)		(1,625	)		(3,046	)
	Accrual reversal		(16	)		(1,334	)		(18	)		(1,368	)
	Balances at September 30, 2013	$	—		$	189		$	1,126		$	1,315

Debt_and_Credit_Arrangements

Debt and Credit Arrangements	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Debt and Credit Arrangements	'
	13 - Debt and Credit Arrangements
	At September 30, 2013 the Company had a $75 million credit facility consisting of a $25 million revolving credit line and a $50 million 5-year term loan with Wells Fargo Bank, National Association (“Wells Fargo”). The credit facility contains covenants, including covenants relating to liquidity and other financial measurements, and provides for events of default, including failure to pay any interest when due, failure to perform or observe covenants, bankruptcy or insolvency events, and the occurrence of a material adverse effect, and restricts our ability to pay dividends. We are in compliance with all covenants as of September 30, 2013. We have granted Wells Fargo a security interest in substantially all of our assets. We have no other significant credit facilities.
	During the first quarter 2013 we borrowed $22 million under the credit facility principally to fund the Grass acquisition and to provide for other working capital needs. We had no additional borrowings.
	The credit facility was increased to $75 million in June 2013 and the term was extended to five years. As part of the amended credit facility in June 2013, we converted $31.2 million of short-term revolving debt to a term loan, increasing the term loan from $18.8 million as of March 31, 2013 to $50 million as of June 30, 2013.
	Long-term debt is comprised of the following (2013 and 2012 columns in thousands):
		September 30,			December 31,
		2013			2012
	Term loan $50 million, interest at LIBOR plus 1.75%, due September 30, 2018 with term loan principle repayable in quarterly installments of $2.5 million	$	47,500		$	20,834
	Term loan $2.9 million Canadian (“CAD”), interest at cost of funds plus 2.5%, due September 15, 2014 with principle repayable in monthly installments of $16,000 until August 15, 2014 and one final payment of $404,000 collateralized by a first lien on company owned land and building		563			726
	Total		48,063			21,560
	Less: current portion of long-term debt		(10,563	)		(8,526	)
	Total long-term debt	$	37,500		$	13,034
	Maturities of long-term debt as of September 30, 2013 are as follows (in thousands):
	Three months ended December 31, 2013	$	2,547
	2014		10,516
	2015		10,000
	2016		10,000
	2017		10,000
	2018		5,000
	Total	$	48,063
	At September 30, 2013 and December 31, 2012, the carrying value of total debt approximates fair market value. The fair value of the Company’s debt is considered a Level 2 measurement.

Segment_Customer_and_Geographi

Segment, Customer and Geographic Information	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Segment, Customer and Geographic Information	'
	14 - Segment, Customer and Geographic Information
	We operate in one reportable segment in which we provide healthcare products used for the screening, detection, treatment, monitoring and tracking of common medical ailments.
	Our end-user customer base includes hospitals, clinics, laboratories, physicians, nurses, audiologists, and governmental agencies. Most of our international sales are to distributors who resell our products to end users or sub-distributors.
	Revenue and long-lived asset information is as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Consolidated Revenue:
	United States	$	51,412	$	48,003	$	147,702	$	112,540
	Foreign countries		33,980		33,016		105,773		88,919
	Totals	$	85,392	$	81,019	$	253,475	$	201,459
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Revenue by End Market:
	Neurology Products
	Devices and Systems	$	34,729	$	30,722	$	100,630	$	70,409
	Supplies		15,311		14,922		45,949		29,791
	Services		5,313		4,867		17,258		8,589
	Total Neurology Revenue		55,353		50,511		163,837		108,879
	Newborn Care Products
	Devices and Systems		18,163		17,342		51,461		55,642
	Supplies		10,031		11,806		33,032		33,602
	Services		1,845		1,360		5,145		3,426
	Total Newborn Care Revenue		30,039		30,508		89,638		92,670
	Total Revenue	$	85,392	$	81,019	$	253,475	$	201,459
		September 30,		December 31,
		2013		2012
	Long-lived assets, net:
	United States	$	9,829	$	9,813
	Foreign countries		14,596		16,699
	Totals	$	24,425	$	26,512
	Long-lived assets consist principally of property and equipment, net of accumulated depreciation and amortization. During the three and nine months ended September 30, 2013 and 2012, no single customer or foreign country contributed to more than 10% of revenue.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	15 - Fair Value Measurements
	ASC 820 defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. Fair value is defined under ASC 820 as the exit price associated with the sale of an asset or transfer of a liability in an orderly transaction between market participants at the measurement date. ASC 820 establishes the following three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value:
	Level 1 - Quoted prices (unadjusted) in active markets that are accessible at the measurement date for assets or liabilities. The fair value hierarchy gives the highest priority to Level 1 inputs.
	Level 2 - Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets and liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
	Level 3 - Unobservable inputs that are used when little or no market data is available. The fair value hierarchy gives the lowest priority to Level 3 inputs.
	The fair value of our assets and liabilities subject to fair value measurements are as follows (in thousands):
		Fair Value as		Fair Value Measurements as of
		of		9/30/13 Using Fair Value Hierarchy
		9/30/13		Level 1		Level 2		Level 3
	Bank money market investments	$	1,149		—	$	1,149		—
	Total	$	1,149		—	$	1,149		—
		Fair Value		Fair Value Measurements as of
		as of		12/31/12 Using Fair Value Hierarchy
		12/31/12		Level 1		Level 2		Level 3
	Bank money market investments	$	1,148		—	$	1,148		—
	Total	$	1,148		—	$	1,148		—
	The carrying amount of the Company’s long term debt approximates fair value based on Level 2 inputs since the debt carries a variable interest rate that is tied to the current LIBOR rate plus a spread.
	Non-financial assets such as goodwill, intangible assets, and property, plant, and equipment are evaluated for impairment and adjusted to fair value using Level 3 inputs, only when impairment is recognized. Fair values are considered Level 3 when management makes significant assumptions in developing a discounted cash flow model based upon a number of considerations including projections of revenues, earnings and a discount rate. In addition, in evaluating the fair value of goodwill impairment, further corroboration is obtained using our market capitalization. No impairment was recorded in the first nine months of 2013 and 2012.

Immaterial_Corrections_to_Prio

Immaterial Corrections to Prior Period Financial Statements	9 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Immaterial Corrections to Prior Period Financial Statements	'
	16 - Immaterial Corrections to Prior Period Financial Statements
	Certain amounts previously reported in the condensed consolidated statements of operations and comprehensive income (loss) and condensed statements of cash flows for the three and nine month periods ended September 30, 2012 have been restated to reflect the correction of immaterial errors as disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012. The errors were related primarily to purchase accounting adjustments. In addition, certain other errors related to the liability associated with product trade-ins, currency loss on translation of foreign debt, amortization of intangible assets, the tax benefit associated with the release of accruals for uncertain tax positions were identified and corrected. The errors are not material individually or in the aggregate.
	A summary of the effects of the correction of these errors on our condensed consolidated financial statements for the three and nine month periods ended September 30, 2012 are presented in the table below (in thousands):
		Three Months Ended						Nine Months Ended
		September 30, 2012						September 30, 2012
		As			As			As			As
		Previously			Corrected			Previously			Corrected
		Reported						Reported
	Condensed Consolidated Statements of Operations and Comprehensive Income
	Revenue	$	80,724		$	81,019		$	201,247		$	201,459
	Cost of revenue		36,453			36,456			89,266			89,237
	Gross profit		44,271			44,563			111,981			112,222
	Income (loss) from operations		(4,851	)		(4,566	)		(3,885	)		(3,521	)
	Income (loss) before provision for income tax		(5,079	)		(4,784	)		(3,659	)		(3,262	)
	Net income (loss)		(1,949	)		(1,747	)		(1,146	)		(1,134	)
	Condensed Consolidated Statements of Cash Flows
	Net income (loss)							$	(1,146	)	$	(1,134	)
	Depreciation and amortization								9,532			9,356
	Change in operating assets and liabilities
	Inventories								5,131			5,154
	Deferred income tax								(648	)		7
	Accrued liabilities and deferred revenue								6,261			5,803
	Net cash provided by operating activities								16,982			17,038
	Exchange rate changes effect on cash and cash equivalents								(32	)		(88	)

Basis_of_Presentation_Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income - In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. (“ASU”) 2013-02, Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This topic requires us to provide information about the amounts reclassified out of accumulated other comprehensive income by component and the line items of net income to which significant amounts are reclassified. This topic is for annual and interim periods beginning after December 15, 2012. The update did not have a material impact on the Company’s consolidated financial position, results of operations or cash flows.

Business_Combinations_Tables

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
Unaudited Pro forma Financial Information	'
	The following unaudited pro forma information combining results of operations of the Company for the nine months ended September 30, 2013 and 2012 are presented as if the acquisitions of Grass and Nicolet had occurred on January 1, 2012:
	Unaudited Pro forma Financial Information
	(in thousands)
		Nine Months Ended
		September 30,
		2013		2012
	Revenue	$	254,480	$	287,781
	Income (loss) from operations	$	21,603	$	(1,298	)

Inventories_Tables

Inventories (Tables)	9 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Summary of Inventories	'
	Inventories consist of the following (in thousands):
		September 30,			December 31,
		2013			2012
	Raw materials and subassemblies	$	21,814		$	21,373
	Work in process		3,007			3,085
	Finished goods		19,409			19,795
	Total inventories		44,230			44,253
	Less: Non-current inventories		(4,854	)		(3,497	)
	Inventories, current	$	39,376		$	40,756

Intangible_Assets_Tables

Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Components of Gross and Net Intangible Asset Balances	'
	The following table summarizes the components of gross and net intangible asset balances (in thousands):
		September 30, 2013												December 31, 2012
		Gross			Accumulated			Accumulated			Net Book			Gross			Accumulated			Accumulated			Net Book
		Carrying			Impairment			Amortization			Value			Carrying			Impairment			Amortization			Value
		Amount												Amount
	Intangible assets with definite lives:
	Technology	$	66,380			—		$	(24,161	)	$	42,219		$	63,880			—		$	(20,901	)	$	42,979
	Customer related		32,148			—			(9,563	)		22,585			26,948			—			(7,563	)		19,385
	Internally developed software		11,068			—			(4,816	)		6,252			9,790			—			(4,045	)		5,745
	Patents		2,812			—			(2,016	)		796			2,812			—			(1,925	)		887
	Backlog		724			—			(724	)		—			724			—			(724	)		—
	Definite-lived intangible assets		113,132						(41,280	)		71,852			104,154						(35,158	)		68,996
	Intangible assets with indefinite lives:
	Tradenames		33,770			(1,560	)		—			32,210			30,778			(1,560	)		—			29,218
	Total Intangibles before translation		146,902			(1,560	)		(41,280	)		104,062			134,932			(1,560	)		(35,158	)		98,214
	Translation		(1,964	)		—			278			(1,687	)		(1,864	)		—			244			(1,620	)
	Total intangibles assets	$	144,938		$	(1,560	)	$	(41,002	)	$	102,377		$	133,068		$	(1,560	)	$	(34,914	)	$	96,594
Amortization Expense Related to Intangible Assets with Definite Lives	'
	Amortization expense related to intangible assets with definite lives was as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Technology	$	1,095		$	1,034		$	3,260		$	2,575
	Customer Related		678			595			2,000			1,491
	Internally developed software		262			68			771			1,269
	Patents		30			60			91			161
	Backlog		—			712			—			712
	Total amortization	$	2,065		$	2,469		$	6,122		$	6,208
Expected Amortization Expense Related to Amortizable Intangible Assets	'
	Expected amortization expense related to amortizable intangible assets is as follows (in thousands):
	Three months ending December 31, 2013	$	2,032
	2014		7,922
	2015		7,581
	2016		6,747
	2017		6,364
	2018		6,193
	Thereafter		35,013
	Total expected amortization expense	$	71,852

Goodwill_Tables

Goodwill (Tables)	9 Months Ended
	Sep. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Carrying Amount of Goodwill	'
	The carrying amount of goodwill and the changes in those balances are as follows (in thousands):
	Gross Balance, December 31, 2012	$	112,048
	Accumulated impairment losses		(20,000	)
	Balance net of impairment losses, December 31, 2012		92,048
	Goodwill as a result of acquisitions		5,607
	Foreign currency translation		(332	)
	Balance, September 30, 2013	$	97,323

Property_and_Equipment_net_Tab

Property and Equipment, net (Tables)	9 Months Ended
	Sep. 30, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment Net	'
	Property and equipment, net consist of the following (in thousands):
		September 30,			December 31,
		2013			2012
	Land	$	4,232		$	4,371
	Buildings		10,737			11,422
	Leasehold improvements		3,376			3,450
	Office furniture and equipment		12,182			11,601
	Computer software and hardware		10,881			10,114
	Demonstration and loaned equipment		11,372			11,505
			52,780			52,463
	Accumulated depreciation and amortization		(28,355	)		(25,951	)
	Total	$	24,425		$	26,512

Reserve_for_Product_Warranties1

Reserve for Product Warranties (Tables)	9 Months Ended
	Sep. 30, 2013
Guarantees [Abstract]	'
Reserve for Product Warranties	'
	The details of activity in the warranty reserve are as follows (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Balance, beginning of period	$	2,070		$	2,225		$	2,260		$	2,157
	Acquisition warranty assumed		—			630			191			630
	Warranty accrued for the period		47			129			818			540
	Repairs for the period		(83	)		(500	)		(1,235	)		(843	)
	Balance, end of period	$	2,034		$	2,484		$	2,034		$	2,484

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Share-Based Compensation Expense	'
	Detail of share-based compensation expense is as follows (in thousands):
		Three Months Ended					Nine Months Ended
		September 30,					September 30,
		2013			2012		2013		2012
	Cost of revenue	$	14		$	49	$	109	$	161
	Marketing and sales		202			400		675		927
	Research and development		175			167		416		380
	General and administrative		1,037			1,855		3,408		3,539
	Total	$	1,428		$	2,471	$	4,608	$	5,007
Stock Options Activity	'
	Activity in our stock options during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted		Weighted-		Aggregate
					Average		average		intrinsic
					Exercise		remaining		value
					Price		contractual		($ 000’s)
							life (years)
	Outstanding, beginning of period		3,882,239		$	11.71
	Granted		626,420		$	14.08
	Exercised		(562,688	)	$	8.09
	Cancelled		(642,243	)	$	15.52
	Outstanding, end of period		3,303,728		$	12.03		4	$	10,059
	Exercisable, end of period		2,198,970		$	11.38		2.2	$	8,647
	Vested and expected to vest, end of period		3,138,903		$	11.97		3.8	$	9,859
Restricted Stock Awards Activity	'
	Activity in our restricted stock awards (“RSAs”) during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted-		Remaining cost
					average		expected to be
					grant date		recognized
					fair value		($ 000’s)
	Unvested, beginning of period		690,890		$	13.02
	Granted		311,180		$	14.06
	Vested		(226,395	)	$	13.92
	Forfeited		(150,020	)	$	12.87
	Unvested, end of period		625,655		$	13.27	$	9.2
Restricted Stock Units Activity	'
	Activity in our restricted stock units (“RSUs”) during the nine months ended September 30, 2013 is as follows:
		Shares			Weighted-		Aggregate
					average		intrinsic value
					remaining
					contractual
					life (years)
	Outstanding, beginning of period		50,050
	Awarded		30,890
	Released		(9,974	)
	Forfeited		(15,875	)
	Outstanding, end of period		55,091			1.8	$	781,000

Other_Income_Expense_Net_Table

Other Income (Expense), Net (Tables)	9 Months Ended
	Sep. 30, 2013
Other Income And Expenses [Abstract]	'
Schedule of Other Income (Expense), Net	'
	Other income (expense), net consisted of (in thousands):
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Investment income	$	4		$	11		$	68		$	20
	Interest expense		(138	)		(215	)		(1,084	)		(231	)
	Foreign currency exchange gain (loss)		(165	)		136			(215	)		470
	Other		(281	)		(150	)		(206	)		—
	Total other income (expense), net	$	(580	)	$	(218	)	$	(1,437	)	$	259

Restructuring_Reserves_Tables

Restructuring Reserves (Tables)	9 Months Ended
	Sep. 30, 2013
Restructuring And Related Activities [Abstract]	'
Detail of Activity in Restructing Reserves	'
	Activity in the restructuring reserves for these plans for the nine months ended September 30, 2013 is as follows (in thousands):
		2011			July			2013			Totals
		Plans			2012 Plan			Plans
	Balances at December 31, 2012	$	83		$	2,662		$	—		$	2,745
	Expense – Severance		4			211			2,198			2,413
	Expense – Lease Termination		—			—			571			571
	Cash payments		(71	)		(1,350	)		(1,625	)		(3,046	)
	Accrual reversal		(16	)		(1,334	)		(18	)		(1,368	)
	Balances at September 30, 2013	$	—		$	189		$	1,126		$	1,315

Debt_and_Credit_Arrangements_T

Debt and Credit Arrangements (Tables)	9 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Components of Long-Term Debt	'
	Long-term debt is comprised of the following (2013 and 2012 columns in thousands):
		September 30,			December 31,
		2013			2012
	Term loan $50 million, interest at LIBOR plus 1.75%, due September 30, 2018 with term loan principle repayable in quarterly installments of $2.5 million	$	47,500		$	20,834
	Term loan $2.9 million Canadian (“CAD”), interest at cost of funds plus 2.5%, due September 15, 2014 with principle repayable in monthly installments of $16,000 until August 15, 2014 and one final payment of $404,000 collateralized by a first lien on company owned land and building		563			726
	Total		48,063			21,560
	Less current portion of long-term debt		(10,563	)		(8,526	)
	Total long-term debt	$	37,500		$	13,034
Maturities of Long-Term Debt	'
	Maturities of long-term debt as of September 30, 2013 are as follows (in thousands):
	Three months ended December 31, 2013	$	2,547
	2014		10,516
	2015		10,000
	2016		10,000
	2017		10,000
	2018		5,000
	Total	$	48,063

Segment_Customer_and_Geographi1

Segment, Customer and Geographic Information (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Revenue and Long-Lived Asset Information by Geographic Region	'
	Revenue and long-lived asset information is as follows (in thousands):
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Consolidated Revenue:
	United States	$	51,412	$	48,003	$	147,702	$	112,540
	Foreign countries		33,980		33,016		105,773		88,919
	Totals	$	85,392	$	81,019	$	253,475	$	201,459
		Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Revenue by End Market:
	Neurology Products
	Devices and Systems	$	34,729	$	30,722	$	100,630	$	70,409
	Supplies		15,311		14,922		45,949		29,791
	Services		5,313		4,867		17,258		8,589
	Total Neurology Revenue		55,353		50,511		163,837		108,879
	Newborn Care Products
	Devices and Systems		18,163		17,342		51,461		55,642
	Supplies		10,031		11,806		33,032		33,602
	Services		1,845		1,360		5,145		3,426
	Total Newborn Care Revenue		30,039		30,508		89,638		92,670
	Total Revenue	$	85,392	$	81,019	$	253,475	$	201,459
		September 30,		December 31,
		2013		2012
	Long-lived assets, net:
	United States	$	9,829	$	9,813
	Foreign countries		14,596		16,699
	Totals	$	24,425	$	26,512

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements of Assets and Liabilities	'
	The fair value of our assets and liabilities subject to fair value measurements are as follows (in thousands):
		Fair Value as		Fair Value Measurements as of
		of		9/30/13 Using Fair Value Hierarchy
		9/30/13		Level 1		Level 2		Level 3
	Bank money market investments	$	1,149		—	$	1,149		—
	Total	$	1,149		—	$	1,149		—
		Fair Value		Fair Value Measurements as of
		as of		12/31/12 Using Fair Value Hierarchy
		12/31/12		Level 1		Level 2		Level 3
	Bank money market investments	$	1,148		—	$	1,148		—
	Total	$	1,148		—	$	1,148		—

Immaterial_Corrections_to_Prio1

Immaterial Corrections to Prior Period Financial Statements (Tables)	9 Months Ended
	Sep. 30, 2013
Text Block [Abstract]	'
Summary of Effects of Correction of Errors on Consolidated Financial Statements	'
	A summary of the effects of the correction of these errors on our condensed consolidated financial statements for the three and nine month periods ended September 30, 2012 are presented in the table below (in thousands):
		Three Months Ended						Nine Months Ended
		September 30, 2012						September 30, 2012
		As			As			As			As
		Previously			Corrected			Previously			Corrected
		Reported						Reported
	Condensed Consolidated Statements of Operations and Comprehensive Income
	Revenue	$	80,724		$	81,019		$	201,247		$	201,459
	Cost of revenue		36,453			36,456			89,266			89,237
	Gross profit		44,271			44,563			111,981			112,222
	Income (loss) from operations		(4,851	)		(4,566	)		(3,885	)		(3,521	)
	Income (loss) before provision for income tax		(5,079	)		(4,784	)		(3,659	)		(3,262	)
	Net income (loss)		(1,949	)		(1,747	)		(1,146	)		(1,134	)
	Condensed Consolidated Statements of Cash Flows
	Net income (loss)							$	(1,146	)	$	(1,134	)
	Depreciation and amortization								9,532			9,356
	Change in operating assets and liabilities
	Inventories								5,131			5,154
	Deferred income tax								(648	)		7
	Accrued liabilities and deferred revenue								6,261			5,803
	Net cash provided by operating activities								16,982			17,038
	Exchange rate changes effect on cash and cash equivalents								(32	)		(88	)

Business_Combinations_Addition

Business Combinations - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended			9 Months Ended		3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
						Nicolet [Member]	Nicolet [Member]	Grass Technologies [Member]	Grass Technologies [Member]	Grass Technologies [Member]	Grass Technologies [Member]
Business Acquisition [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Acquisition date of entity	'	'	'	'	'	2-Jul-12	'	'	'	2-Feb-13	'
Purchase price paid in cash to acquire entity	'	'	'	'	'	$55,500,000	'	'	'	$18,600,000	'
Direct cost associated with entity acquisition	'	'	'	'	'	3,300,000	'	'	'	624,000	'
Preliminary purchase price adjustment	0	'	0	'	'	'	'	'	'	'	'
Goodwill	97,323,000	'	97,323,000	'	92,048,000	'	'	5,200,000	5,200,000	5,200,000	'
Revenue	'	'	'	'	'	'	'	3,800,000	9,700,000	'	'
Income from operations	'	'	'	'	'	'	'	1,100,000	2,100,000	'	'
Nicolet's minimum international business share	'	'	'	'	'	50.00%	'	'	'	'	'
Net increase in goodwill	'	'	'	'	'	256,000	'	'	'	'	'
Additional amortization of expense related to fair value identifiable intangible assets acquired	'	'	'	'	'	'	564,636	'	'	59,300	535,000
Decrease in depreciation expense related to property and equipment acquired	'	'	'	'	'	'	782,000	'	'	14,800	134,000
General and administrative	14,323,000	18,811,000	40,160,000	39,206,000	'	'	3,300,000	'	'	624,000	624,000
Amortization of intangible assets acquired (Nicolet)	2,065,000	2,469,000	6,122,000	6,208,000	'	'	423,000	'	'	'	'
Increase in cost of goods sold	'	'	'	'	'	'	$571,000	'	'	'	'

Business_Combinations_Unaudite

Business Combinations - Unaudited Pro forma Financial Information (Detail) (Grass and Nicolet [Member], USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Grass and Nicolet [Member]	'	'
Business Acquisition [Line Items]	'	'
Revenue	$254,480	$264,781
Income (loss) from operations	$21,603	($1,298)

Basic_and_Diluted_Earnings_Per1

Basic and Diluted Earnings Per Common Share - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Common stock equivalents shares included in weighted average shares outstanding used to calculate diluted earnings per share	694,582	0	752,544	0
Common stock equivalents share options excluded in weighted average shares outstanding used to calculate diluted earnings per share	1,657,210	'	1,660,852	'

Inventories_Summary_of_Invento

Inventories - Summary of Inventories (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Raw materials and subassemblies	$21,814	$21,373
Work in process	3,007	3,085
Finished goods	19,409	19,795
Total inventories	44,230	44,253
Less: Non-current inventories	-4,854	-3,497
Inventories, current	$39,376	$40,756

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'
Non-current inventories	($4,854)	($3,497)

Intangible_Assets_Components_o

Intangible Assets - Components of Gross and Net Intangible Asset Balances (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$113,132	$104,154
Accumulated Amortization	-41,280	-35,158
Total expected amortization expense	71,852	68,996
Intangibles Assets, Gross Carrying Amount	144,938	133,068
Total intangible asset, Accumulated Impairment	-1,560	-1,560
Total intangible assets, Accumulated Amortization	-41,002	-34,914
Total intangibles assets	102,377	96,594
Total Intangibles before translation [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	146,902	134,932
Accumulated Impairment	-1,560	-1,560
Accumulated Amortization	-41,280	-35,158
Net Book Value	104,062	98,214
Tradenames [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	33,770	30,778
Accumulated Impairment	-1,560	-1,560
Accumulated Amortization	'	'
Net Book Value	32,210	29,218
Translation [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	-1,964	-1,864
Accumulated Impairment	'	'
Accumulated Amortization	278	244
Net Book Value	-1,687	-1,620
Technology [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	66,380	63,880
Accumulated Amortization	-24,161	-20,901
Total expected amortization expense	42,219	42,979
Customer related [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	32,148	26,948
Accumulated Amortization	-9,563	-7,563
Total expected amortization expense	22,585	19,385
Internally developed software [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	11,068	9,790
Accumulated Amortization	-4,816	-4,045
Total expected amortization expense	6,252	5,745
Patents [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	2,812	2,812
Accumulated Amortization	-2,016	-1,925
Total expected amortization expense	796	887
Backlog [Member]	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	724	724
Accumulated Amortization	-724	-724
Total expected amortization expense	'	'

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Technology [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Weighted average life of intangible assets	'15 years
Customer related [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Weighted average life of intangible assets	'12 years
Internally developed software [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Weighted average life of intangible assets	'7 years
Costs incurred for development of internal use computer software	10,100,000
Costs incurred for development of software to be sold	943,000
Patents [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Weighted average life of intangible assets	'14 years

Intangible_Assets_Amortization

Intangible Assets - Amortization Expense Related to Intangible Assets with Definite Lives (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	$2,065,000	$2,469,000	$6,122,000	$6,208,000
Technology [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	1,095,000	1,034,000	3,260,000	2,575,000
Customer related [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	678,000	595,000	2,000,000	1,491,000
Internally developed software [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	262,000	68,000	771,000	1,269,000
Patents [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	30,000	60,000	91,000	161,000
Backlog [Member]	'	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'	'
Total amortization	'	$712,000	'	$712,000

Intangible_Assets_Expected_Amo

Intangible Assets - Expected Amortization Expense Related to Amortizable Intangible Assets (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Three months ending December 31, 2013	$2,032	'
2014	7,922	'
2015	7,581	'
2016	6,747	'
2017	6,364	'
2018	6,193	'
Thereafter	35,013	'
Total expected amortization expense	$71,852	$68,996

Goodwill_Carrying_Amount_of_Go

Goodwill - Carrying Amount of Goodwill (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Gross Balance, December 31, 2012	'	$112,048
Accumulated impairment losses	'	-20,000
Balance net of impairment losses, December 31, 2012	92,048	'
Goodwill as a result of acquisitions	5,607	'
Foreign currency translation	-332	'
Balance, September 30, 2013	$97,323	'

Property_and_Equipment_net_Pro

Property and Equipment, net - Property and Equipment Net (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	$52,780	$52,463
Accumulated depreciation and amortization	-28,355	-25,951
Total	24,425	26,512
Land [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	4,232	4,371
Buildings [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	10,737	11,422
Leasehold improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	3,376	3,450
Office furniture and equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	12,182	11,601
Computer software and hardware [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	10,881	10,114
Demonstration and loaned equipment [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and Equipment, Gross	$11,372	$11,505

Property_and_Equipment_net_Add

Property and Equipment, net - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Property Plant And Equipment [Abstract]	'	'	'	'
Depreciation and amortization expense of property and equipment	$1.20	$1	$3.50	$3.20

Reserve_for_Product_Warranties2

Reserve for Product Warranties - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2013
Guarantees [Abstract]	'
Product warranty period	'1 year

Reserve_for_Product_Warranties3

Reserve for Product Warranties - Reserve for Product Warranties (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Guarantees [Abstract]	'	'	'	'
Balance, beginning of period	$2,070	$2,225	$2,260	$2,157
Acquisition warranty assumed	'	630	191	630
Warranty accrued for the period	47	129	818	540
Repairs for the period	-83	-500	-1,235	-843
Balance, end of period	$2,034	$2,484	$2,034	$2,484

ShareBased_Compensation_Additi

Share-Based Compensation - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Number of Active Share Based Compensation Plans	2	'
Unrecognized compensation expense related to unvested portion of stock options	$14,800,000	'
Weighted average period of recognition of unrecognized compensation expense	'2 years 10 months 24 days	'
Intrinsic value of options exercised	3,400,000	'
Restricted Stock Awards [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Weighted average period of recognition of unrecognized compensation expense	'2 years 10 months 24 days	'2 years 7 months 6 days
Vesting percentage in second anniversary	50.00%	'
Vesting percentage in third year anniversary	25.00%	'
Vesting percentage in fourth year anniversary	25.00%	'
Fair market value of unvested stock	8,900,000	7,700,000
Restricted Stock Units [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Weighted average period of recognition of unrecognized compensation expense	'2 years 10 months 24 days	'2 years 9 months 18 days
Vesting percentage in second anniversary	50.00%	'
Vesting percentage in third year anniversary	25.00%	'
Vesting percentage in fourth year anniversary	25.00%	'
Aggregate intrinsic value of unvested stock	$781,000	$559,000

ShareBased_Compensation_ShareB

Share-Based Compensation - Share-Based Compensation Expense (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	$1,428	$2,471	$4,608	$5,007
Cost of revenue [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	14	49	109	161
Marketing and sales [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	202	400	675	927
Research and development [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	175	167	416	380
General and administrative [Member]	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Share-based compensation expense	$1,037	$1,855	$3,408	$3,539

ShareBased_Compensation_Stock_

Share-Based Compensation - Stock Options Activity (Detail) (USD $)	9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]	'
Outstanding, beginning of period, Shares	3,882,239
Granted, Shares	626,420
Exercised, Shares	-562,688
Cancelled, Shares	-642,243
Outstanding, end of period, Shares	3,303,728
Exercisable, end of period, Shares	2,198,970
Vested and expected to vest, end of period, Shares	3,138,903
Outstanding, beginning of period, Weighted Average Exercise Price	$11.71
Granted, Weighted Average Exercise Price	$14.08
Exercised, Weighted Average Exercise Price	$8.09
Cancelled, Weighted Average Exercise Price	$15.52
Outstanding, end of period, Weighted Average Exercise Price	$12.03
Exercisable, end of period, Weighted Average Exercise Price	$11.38
Vested and expected to vest, end of period, Weighted Average Exercise Price	$11.97
Outstanding, end of period, Weighted-average remaining contractual life (years)	'4 years
Exercisable, end of period, Weighted-average remaining contractual life (years)	'2 years 2 months 12 days
Vested and expected to vest, end of period, Weighted-average remaining contractual life (years)	'3 years 9 months 18 days
Outstanding, end of period, Aggregate intrinsic value	$10,059
Exercisable, end of period, Aggregate intrinsic value	8,647
Vested and expected to vest, end of period, Aggregate intrinsic value	$9,859

ShareBased_Compensation_Restri

Share-Based Compensation - Restricted Stock Awards Activity (Detail) (Restricted Stock Awards [Member], USD $)	9 Months Ended
	Sep. 30, 2013
Restricted Stock Awards [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Unvested, beginning of period, Shares	690,890
Granted, Shares	311,180
Vested, Shares	-226,395
Forfeited, Shares	-150,020
Unvested, end of period, Shares	625,655
Unvested, beginning of period, Weighted-average grant date fair value	$13.02
Granted, Weighted-average grant date fair value	$14.06
Vested, Weighted-average grant date fair value	$13.92
Forfeited, Weighted-average grant date fair value	$12.87
Unvested, end of period, Weighted-average grant date fair value	$13.27
Unvested, end of period, Remaining cost expected to be recognized	$9,200

ShareBased_Compensation_Restri1

Share-Based Compensation - Restricted Stock Units Activity (Detail) (Restricted Stock Units [Member], USD $)	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Restricted Stock Units [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Unvested, beginning of period, Shares	50,050	'
Awarded, Shares	30,890	'
Released, Shares	-9,974	'
Forfeited, Shares	-15,875	'
Unvested, end of period, Shares	55,091	'
Ending outstanding balance, Weighted-average remaining contractual life (years)	'1 year 9 months 18 days	'
Ending outstanding balance, Aggregate intrinsic value	$781,000	$559,000

Other_income_expense_net_Sched

Other income (expense), net - Schedule of Other Income (Expense), Net (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Investment income	$4	$11	$68	$20
Interest expense	-138	-215	-1,084	-231
Foreign currency exchange gain (loss)	-165	136	-215	470
Other	-281	-150	-206	'
Total other income (expense), net	($580)	($218)	($1,437)	$259

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Tax Contingency [Line Items]	'	'	'	'
Provisions for income tax	$2,300,000	($3,000,000)	$5,000,000	($2,100,000)
Effective tax rate	26.50%	63.50%	26.50%	65.20%
Deduction benefited effective tax rate	'	'	6.00%	'
Minimum [Member]	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Uncertain tax benefit	0	'	0	'
Maximum [Member]	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Uncertain tax benefit	$600,000	'	$600,000	'
U.S. States [Member]	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Open tax examination years	'	'	'2008 through 2012	'
U.S. Federal [Member]	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Open tax examination years	'	'	'2010 through 2012	'
Significant foreign jurisdictions [Member]	'	'	'	'
Income Tax Contingency [Line Items]	'	'	'	'
Open tax examination years	'	'	'2009 through 2012	'

Restructuring_Reserves_Detail_

Restructuring Reserves - Detail of Activity in Restructuring Reserve (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	$2,745
Expense - Severance	2,413
Expense - Lease Termination	571
Cash payments	-3,046
Accrual reversal	-1,368
Ending balance	1,315
2011 Plans [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	83
Expense - Severance	4
Expense - Lease Termination	'
Cash payments	-71
Accrual reversal	-16
Ending balance	'
July 2012 Plan [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	2,662
Expense - Severance	211
Expense - Lease Termination	'
Cash payments	-1,350
Accrual reversal	-1,334
Ending balance	189
2013 Plans [Member]	'
Restructuring Cost and Reserve [Line Items]	'
Beginning balance	'
Expense - Severance	2,198
Expense - Lease Termination	571
Cash payments	-1,625
Accrual reversal	-18
Ending balance	$1,126

Debt_and_Credit_Arrangements_A

Debt and Credit Arrangements - Additional Information (Detail) (USD $)	9 Months Ended						6 Months Ended	9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Mar. 31, 2013	Jun. 30, 2013	Sep. 30, 2013
			Term loan [Member]	Term loan [Member]	Term loan [Member]	Nicolet acquisition [Member]	Revolving credit facility [Member]	Revolving credit facility [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'
Revolving line of credit facility maximum borrowing capacity	$75,000,000	$75,000,000	$50,000,000	'	'	$22,000,000	'	$25,000,000
Term loan expiration period	'5 years	'	'	'	'	'	'	'
Additional borrowings under Revolving line of credit facility	'	'	'	'	'	'	'	0
Extended term of revolving line of credit	'	'	'	'	'	'	'5 years	'
Amount of short-term credit facility converted in to a term loan	'	'	'	'	'	'	31,200,000	'
Term loan outstanding	'	'	'	$50,000,000	$18,800,000	'	'	'

Debt_and_Credit_Arrangements_C

Debt and Credit Arrangements - Components of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Total	$48,063	$21,560
Less current portion of long-term debt	-10,563	-8,526
Long-term debt	37,500	13,034
Term loan [Member] | Interest at LIBOR plus [Member]	'	'
Debt Instrument [Line Items]	'	'
Total	47,500	20,834
Term loan [Member] | Interest at Cost of Funds Plus [Member]	'	'
Debt Instrument [Line Items]	'	'
Total	$563	$726

Debt_and_Credit_Arrangements_C1

Debt and Credit Arrangements - Components of Long-Term Debt (Parenthetical) (Detail) (Term loan [Member])	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Interest at LIBOR plus [Member]	Interest at Cost of Funds Plus [Member]	Interest at Cost of Funds Plus [Member]
	USD ($)	USD ($)	CAD
Debt Instrument [Line Items]	'	'	'
Principal amount of debt	$50,000,000	'	2,900,000
Basis spread interest rate	1.75%	2.50%	'
Maturity date of debt instrument	30-Sep-18	15-Sep-14	'
Periodic principal amount	2,500,000	16,000	'
Final payment, collateralized by a first lien on land and building	'	$404,000	'

Debt_and_Credit_Arrangements_M

Debt and Credit Arrangements - Maturities of Long-Term Debt (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Disclosure [Abstract]	'	'
Three months ended December 31, 2013	$2,547	'
2014	10,516	'
2015	10,000	'
2016	10,000	'
2017	10,000	'
2018	5,000	'
Total	$48,063	$21,560

Segment_Customer_and_Geographi2

Segment, Customer and Geographic Information - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue from External Customer [Line Items]	'	'	'	'
Number of reportable segment	'	'	1	'
Revenue [Member]	'	'	'	'
Revenue from External Customer [Line Items]	'	'	'	'
Percentage of revenue represented by major customers	10.00%	10.00%	10.00%	10.00%

Segment_Customer_and_Geographi3

Segment, Customer and Geographic Information - Revenue and Long-Lived Asset Information by Geographic Region (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Consolidated Revenue:	'	'	'	'	'
Revenue	$85,392	$81,019	$253,475	$201,459	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	85,392	81,019	253,475	201,459	'
Long-lived assets, net:	'	'	'	'	'
Long-lived assets	24,425	'	24,425	'	26,512
Operating Segments [Member] | Neurology Products [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	55,353	50,511	163,837	108,879	'
Operating Segments [Member] | Neurology Products [Member] | Devices and Systems [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	34,729	30,722	100,630	70,409	'
Operating Segments [Member] | Neurology Products [Member] | Supplies [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	15,311	14,922	45,949	29,791	'
Operating Segments [Member] | Neurology Products [Member] | Services [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	5,313	4,867	17,258	8,589	'
Operating Segments [Member] | Newborn Care Products [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	30,039	30,508	89,638	92,670	'
Operating Segments [Member] | Newborn Care Products [Member] | Devices and Systems [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	18,163	17,342	51,461	55,642	'
Operating Segments [Member] | Newborn Care Products [Member] | Supplies [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	10,031	11,806	33,032	33,602	'
Operating Segments [Member] | Newborn Care Products [Member] | Services [Member]	'	'	'	'	'
Revenue by End Market:	'	'	'	'	'
Total Revenue	1,845	1,360	5,145	3,426	'
United States [Member] | Operating Segments [Member]	'	'	'	'	'
Consolidated Revenue:	'	'	'	'	'
Revenue	51,412	48,003	147,702	112,540	'
Long-lived assets, net:	'	'	'	'	'
Long-lived assets	9,829	'	9,829	'	9,813
Foreign countries [Member] | Operating Segments [Member]	'	'	'	'	'
Consolidated Revenue:	'	'	'	'	'
Revenue	33,980	33,016	105,773	88,919	'
Long-lived assets, net:	'	'	'	'	'
Long-lived assets	$14,596	'	$14,596	'	$16,699

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Measurements of Assets and Liabilities (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	$1,149	$1,148
Bank money market investments [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	1,149	1,148
Level 1 [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	'	'
Level 1 [Member] | Bank money market investments [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	'	'
Level 2 [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	1,149	1,148
Level 2 [Member] | Bank money market investments [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	1,149	1,148
Level 3 [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	'	'
Level 3 [Member] | Bank money market investments [Member]	'	'
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items]	'	'
Total assets and liabilities at fair value	'	'

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Fair Value Disclosures [Abstract]	'	'
Impairment charges	$0	$0

Immaterial_Corrections_to_Prio2

Immaterial Corrections to Prior Period Financial Statements - Summary of Effects of Correction of Errors on Consolidated Financial Statements (Detail) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements of Operations and Comprehensive Income	'	'	'	'
Revenue	$85,392	$81,019	$253,475	$201,459
Cost of revenue	34,058	36,456	104,518	89,237
Gross profit	51,334	44,563	148,957	112,222
Income (loss) from operations	9,138	-4,566	20,155	-3,521
Income (loss) before provision for income tax	8,558	-4,784	18,718	-3,262
Net income (loss)	6,287	-1,747	13,749	-1,134
Condensed Consolidated Statements of Cash Flows	'	'	'	'
Net income (loss)	6,287	-1,747	13,749	-1,134
Depreciation and amortization	'	'	9,554	9,356
Change in operating assets and liabilities	'	'	'	'
Inventories	'	'	1,428	-5,154
Deferred income tax	'	'	1,176	7
Accrued liabilities and deferred revenue	'	'	-6,365	5,803
Net cash provided by operating activities	'	'	20,715	17,038
Exchange rate changes effect on cash and cash equivalents	'	'	497	-88
Previously Reported [Member]	'	'	'	'
Condensed Consolidated Statements of Operations and Comprehensive Income	'	'	'	'
Revenue	'	80,724	'	201,247
Cost of revenue	'	36,453	'	89,266
Gross profit	'	44,271	'	111,981
Income (loss) from operations	'	-4,851	'	-3,885
Income (loss) before provision for income tax	'	-5,079	'	-3,659
Net income (loss)	'	-1,949	'	-1,146
Condensed Consolidated Statements of Cash Flows	'	'	'	'
Net income (loss)	'	-1,949	'	-1,146
Depreciation and amortization	'	'	'	9,532
Change in operating assets and liabilities	'	'	'	'
Inventories	'	'	'	5,131
Deferred income tax	'	'	'	-648
Accrued liabilities and deferred revenue	'	'	'	6,261
Net cash provided by operating activities	'	'	'	16,982
Exchange rate changes effect on cash and cash equivalents	'	'	'	($32)