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Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Cash flows from operating activities: |  |
Net loss | $ (25,135) | $ (26,224)
Adjustments to reconcile net loss to net cash used in operations: |  |
Depreciation and amortization | 5,343 | 6,628
Stock-based compensation expense | 4,287 | 4,039
Restructuring charges, net of payments | 161 | (49)
Provision for excess and obsolete inventory | 192 | 421
Adverse purchase commitment recoveries, net |  | (8,309)
Loss on minority interest investments | 499 | 1,490
Change in fair value of derivatives and warrants | (1,355) | (897)
Non-cash interest expense | 4,765 | 4,443
Other non-cash items | 892 | 350
Changes in operating asset and liability accounts: |  |
Accounts receivable | 10,704 | 2,856
Inventory | 9,315 | (971)
Prepaid expenses and other current assets | 3,531 | 8,394
Accounts payable and accrued expenses | (9,105) | (14,900)
Deferred revenue | (18,873) | (2,236)
Net cash used in operating activities | (14,779) | (24,965)
Cash flows from investing activities: |  |
Purchase of property, plant and equipment | (115) | (903)
Proceeds from the maturity of marketable securities |  | 84
Change in restricted cash | 4,053 | (4,116)
Change in other assets | (495) |
Net cash provided by (used in) investing activities | 3,443 | (4,935)
Cash flows from financing activities: |  |
Employee taxes paid related to net settlement of equity awards | (57) | (36)
Proceeds from the issuance of debt, net of expenses |  | 32,895
Repayment of debt | (2,308) |
Proceeds from exercise of employee stock options and ESPP | 99 | 178
Net cash (used in) provided by financing activities | (2,266) | 33,037
Effect of exchange rate changes on cash and cash equivalents | 226 | (280)
Net (decrease) increase in cash and cash equivalents | (13,376) | 2,857
Cash and cash equivalents at beginning of year | 39,243 | 46,279
Cash and cash equivalents at end of period | 25,867 | 49,136
Supplemental schedule of cash flow information: |  |
Cash paid for income taxes, net of refunds |  | (752)
Issuance of common stock to settle liabilities | 7,831 | 2,676
Cash paid for interest | $ 400 | $ 269

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination. + References No definition available. + Details
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- Definition The total cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards, including stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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