CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues:
Patient services	$ 34,981	$ 29,294
Research services	5,428us-gaap_SalesRevenueServicesNet	4,840us-gaap_SalesRevenueServicesNet
Product	3,026us-gaap_SalesRevenueGoodsNet	3,028us-gaap_SalesRevenueGoodsNet
Total revenues	43,435us-gaap_Revenues	37,162us-gaap_Revenues
Cost of revenues:
Patient services	13,177	11,126
Research services	2,953us-gaap_CostOfServices	2,756us-gaap_CostOfServices
Product	2,082us-gaap_CostOfGoodsSold	1,636us-gaap_CostOfGoodsSold
Total cost of revenues	18,212us-gaap_CostOfRevenue	15,518us-gaap_CostOfRevenue
Gross profit	25,223us-gaap_GrossProfit	21,644us-gaap_GrossProfit
Operating expenses:
General and administrative	11,397us-gaap_GeneralAndAdministrativeExpense	10,772us-gaap_GeneralAndAdministrativeExpense
Sales and marketing	7,183us-gaap_SellingAndMarketingExpense	7,440us-gaap_SellingAndMarketingExpense
Bad debt expense	2,349us-gaap_ProvisionForDoubtfulAccounts	2,359us-gaap_ProvisionForDoubtfulAccounts
Research and development	1,965us-gaap_ResearchAndDevelopmentExpense	1,789us-gaap_ResearchAndDevelopmentExpense
Integration, restructuring and other charges	1,860	2,980
Total operating expenses	24,754us-gaap_OperatingExpenses	25,340us-gaap_OperatingExpenses
Income (loss) from operations	469us-gaap_OperatingIncomeLoss	(3,696)us-gaap_OperatingIncomeLoss
Interest and other loss, net	(390)us-gaap_NonoperatingIncomeExpense	(3,271)us-gaap_NonoperatingIncomeExpense
Income (loss) before income taxes	79	(6,967)
(Loss) benefit from income taxes	(148)us-gaap_IncomeTaxExpenseBenefit	2,845us-gaap_IncomeTaxExpenseBenefit
Net loss	(69)	(4,122)
Net loss per common share:
Basic and diluted (in dollars per share)	$ 0.00us-gaap_EarningsPerShareBasicAndDiluted	$ (0.16)us-gaap_EarningsPerShareBasicAndDiluted
Weighted average number of common shares outstanding:
Basic and diluted (in shares)	26,934,707	26,110,825
Other comprehensive loss:
Foreign currency translation loss	(11)
Comprehensive loss	$ (80)us-gaap_ComprehensiveIncomeNetOfTax

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement. This element also includes integration costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

No definition available.